I've been doing CCNP ROUTE (v1.0) labs relentlessly for the last couple of months and I enjoyed every moment of it. I was able to understand the foundation and intricacies of different routing protocols and it also helps me get better at my networking job.
I'm already halfway through my quick CCDP journey and performing the ROUTE labs helped me reinforce some of the advance routing concepts. I'll be doing labs for CCNP SWITCH next and I'm currently modifying my home lab.
In this lab, I did a redistribution between EIGRP and OSPF. Redistribution is very common in an enterprise especially if there's an acquisition or merger between companies. At work, we've got different redistribution points, such as between RIP and OSPF as well as OSPF and BGP.
R1(config)#router eigrp 1
R1(config-router)#no auto-summary
R1(config-router)#network 172.16.0.0
R1(config-router)#network 192.168.48.0
R1(config-router)#network 192.168.49.0
R1(config-router)#network 192.168.50.0
R1(config-router)#network 192.168.51.0
R1(config-router)#network 192.168.70.0
R1#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.12.2 Se0/0/0 11 00:00:48 27 2280 0 3
R1#show ip route eigrp
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:00:52, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:00:52, Serial0/0/0
R2(config)#router eigrp 1
R2(config-router)#no auto-summary
R2(config-router)#network 172.16.0.0
R2(config-router)#
*Dec 21 09:38:46.827: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.1 (Serial0/0/0) is up: new adjacency
R2#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.12.1 Se0/0/0 13 00:00:11 38 2280 0 3
R2#show ip route eigrp
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.1.0 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.49.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.48.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
R2#show ip eigrp ?
<1-65535> Autonomous System
accounting IP-EIGRP Accounting
interfaces IP-EIGRP interfaces
neighbors IP-EIGRP neighbors
topology IP-EIGRP Topology Table
traffic IP-EIGRP Traffic Statistics
vrf Select a VPN Routing/Forwarding instance
R2#show ip eigrp interfaces // BOTH SERIAL INTERFACES ARE ENABLED FOR EIGRP BECAUSE OF CLASSFUL NETWORK COMMAND USED
IP-EIGRP interfaces for process 1
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se0/0/0 1 0/0 38 10/380 552 0
Se0/0/1 0 0/0 0 10/10 0 0
Lo100 0 0/0 0 0/1 0 0
R2(config)#router eigrp 1
R2(config-router)#passive-interface serial0/0/1
R2#show ip eigrp interfaces
IP-EIGRP interfaces for process 1
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se0/0/0 1 0/0 38 10/380 552 0
Lo100 0 0/0 0 0/1 0 0
R2#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
172.16.0.0
Passive Interface(s):
Serial0/0/1
Routing Information Sources:
Gateway Distance Last Update
172.16.12.1 90 00:04:08
Distance: internal 90 external 170
R1(config)#interface s0/0/0
R1(config-if)#ip summary-address ?
eigrp Enhanced Interior Gateway Routing Protocol (EIGRP)
rip Routing Information Protocol (RIP)
R1(config-if)#ip summary-address eigrp ?
<1-65535> Autonomous system number
R1(config-if)#ip summary-address eigrp 1 ?
A.B.C.D IP address
R1(config-if)#ip summary-address eigrp 1 192.168.48.0 ?
A.B.C.D IP network mask
R1(config-if)#ip summary-address eigrp 1 192.168.48.0 255.255.254.0
R1(config-if)#
*Dec 21 11:03:10.863: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.2 (Serial0/0/0) is resync:summary configured
R1#show ip route eigrp
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:07:08, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:07:08, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:00:20, Null0
R1#show ip route 192.168.48.0 255.255.254.0
Routing entry for 192.168.48.0/23, supernet
Known via "eigrp 1", distance 5, metric 128256, type internal
Redistributing via eigrp 1
Routing Descriptor Blocks:
* directly connected, via Null0
Route metric is 128256, traffic share count is 1
Total delay is 5000 microseconds, minimum bandwidth is 10000000 Kbit
Reliability 255/255, minimum MTU 1514 bytes
Loading 1/255, Hops 0
R2(config)#interface loopback100
R2(config-if)#ip ospf 1 area 10
R2(config-if)#ip ospf network point-to-point
R2(config-if)#interface s0/0/1
R2(config-if)#ip ospf 1 area 0
*Dec 21 09:49:06.715: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.40.1 on Serial0/0/1 from LOADING to FULL, Loading Done
R2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
192.168.40.1 0 FULL/ - 00:00:36 172.16.23.3 Serial0/0/1
R3(config)#interface s0/0/1
R3(config-if)#ip ospf 1 area 0
R3(config-if)#interface loopback0
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback20
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback25
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback30
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback35
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback40
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback8
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback9
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback10
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback11
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
172.16.100.1 0 FULL/ - 00:00:31 172.16.23.2 Serial0/0/1
R2#show ip route ospf
O 192.168.30.0/24 [110/1563] via 172.16.23.3, 00:04:44, Serial0/0/1
O IA 192.168.8.0/24 [110/1563] via 172.16.23.3, 00:03:50, Serial0/0/1
O 192.168.25.0/24 [110/1563] via 172.16.23.3, 00:04:44, Serial0/0/1
O IA 192.168.9.0/24 [110/1563] via 172.16.23.3, 00:03:50, Serial0/0/1
O IA 192.168.10.0/24 [110/1563] via 172.16.23.3, 00:03:40, Serial0/0/1
O 192.168.40.0/24 [110/1563] via 172.16.23.3, 00:04:24, Serial0/0/1
172.16.0.0/24 is subnetted, 6 subnets
O 172.16.3.0 [110/1563] via 172.16.23.3, 00:05:04, Serial0/0/1
O IA 192.168.11.0/24 [110/1563] via 172.16.23.3, 00:03:40, Serial0/0/1
O 192.168.20.0/24 [110/1563] via 172.16.23.3, 00:04:54, Serial0/0/1
O 192.168.35.0/24 [110/1563] via 172.16.23.3, 00:04:34, Serial0/0/1
R2#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
O 192.168.30.0/24 [110/1563] via 172.16.23.3, 00:06:10, Serial0/0/1
O IA 192.168.8.0/24 [110/1563] via 172.16.23.3, 00:05:16, Serial0/0/1
O 192.168.25.0/24 [110/1563] via 172.16.23.3, 00:06:10, Serial0/0/1
O IA 192.168.9.0/24 [110/1563] via 172.16.23.3, 00:05:16, Serial0/0/1
O IA 192.168.10.0/24 [110/1563] via 172.16.23.3, 00:05:06, Serial0/0/1
O 192.168.40.0/24 [110/1563] via 172.16.23.3, 00:05:50, Serial0/0/1
172.16.0.0/24 is subnetted, 6 subnets
C 172.16.23.0 is directly connected, Serial0/0/1
C 172.16.12.0 is directly connected, Serial0/0/0
D 172.16.1.0 [90/40640000] via 172.16.12.1, 00:17:46, Serial0/0/0
C 172.16.2.0 is directly connected, Loopback0
O 172.16.3.0 [110/1563] via 172.16.23.3, 00:06:30, Serial0/0/1
C 172.16.100.0 is directly connected, Loopback100
O IA 192.168.11.0/24 [110/1563] via 172.16.23.3, 00:05:08, Serial0/0/1
O 192.168.20.0/24 [110/1563] via 172.16.23.3, 00:06:22, Serial0/0/1
D 192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:17:48, Serial0/0/0
D 192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:17:48, Serial0/0/0
O 192.168.35.0/24 [110/1563] via 172.16.23.3, 00:06:02, Serial0/0/1
D 192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:17:48, Serial0/0/0
D 192.168.48.0/23 [90/40640000] via 172.16.12.1, 00:11:00, Serial0/0/0
R3(config)#router ospf 1
R3(config-router)#area 20 ?
authentication Enable authentication
default-cost Set the summary default-cost of a NSSA/stub area
filter-list Filter networks between OSPF areas
nssa Specify a NSSA area
range Summarize routes matching address/mask (border routers only)
sham-link Define a sham link and its parameters
stub Specify a stub area
virtual-link Define a virtual link and its parameters
R3(config-router)#area 20 range ?
A.B.C.D IP address to match
R3(config-router)#area 20 range 192.168.8.0 ?
A.B.C.D IP mask for address
R3(config-router)#area 20 range 192.168.8.0 255.255.252.0
R2#show ip route ospf
O 192.168.30.0/24 [110/1563] via 172.16.23.3, 00:07:28, Serial0/0/1
O 192.168.25.0/24 [110/1563] via 172.16.23.3, 00:07:28, Serial0/0/1
O 192.168.40.0/24 [110/1563] via 172.16.23.3, 00:07:08, Serial0/0/1
172.16.0.0/24 is subnetted, 6 subnets
O 172.16.3.0 [110/1563] via 172.16.23.3, 00:07:48, Serial0/0/1
O 192.168.20.0/24 [110/1563] via 172.16.23.3, 00:07:38, Serial0/0/1
O 192.168.35.0/24 [110/1563] via 172.16.23.3, 00:07:18, Serial0/0/1
O IA 192.168.8.0/22 [110/1563] via 172.16.23.3, 00:00:11, Serial0/0/1
R2(config)#router ospf 1
R2(config-router)#redistribute ?
bgp Border Gateway Protocol (BGP)
connected Connected
eigrp Enhanced Interior Gateway Routing Protocol (EIGRP)
isis ISO IS-IS
iso-igrp IGRP for OSI networks
maximum-prefix Maximum number of prefixes redistributed to protocol
metric Metric for redistributed routes
metric-type OSPF/IS-IS exterior metric type for redistributed routes
mobile Mobile routes
odr On Demand stub Routes
ospf Open Shortest Path First (OSPF)
rip Routing Information Protocol (RIP)
route-map Route map reference
static Static routes
subnets Consider subnets for redistribution into OSPF
tag Set tag for routes redistributed into OSPF
<cr>
R2(config-router)#redistribute eigrp ?
<1-65535> Autonomous system number
R2(config-router)#redistribute eigrp 1 ?
metric Metric for redistributed routes
metric-type OSPF/IS-IS exterior metric type for redistributed routes
route-map Route map reference
subnets Consider subnets for redistribution into OSPF
tag Set tag for routes redistributed into OSPF
<cr>
R2(config-router)#redistribute eigrp 1 subnets
R2(config)#router eigrp 1
R2(config-router)#redistribute ospf ?
<1-65535> Process ID
R2(config-router)#redistribute ospf 1 ?
match Redistribution of OSPF routes
metric Metric for redistributed routes
route-map Route map reference
vrf VPN Routing/Forwarding Instance
<cr>
R2(config-router)#redistribute ospf 1 metric ?
<1-4294967295> Bandwidth metric in Kbits per second
R2(config-router)#redistribute ospf 1 metric 1000 ?
<0-4294967295> EIGRP delay metric, in 10 microsecond units
R2(config-router)#redistribute ospf 1 metric 1000 100 ?
<0-255> EIGRP reliability metric where 255 is 100% reliable
R2(config-router)#redistribute ospf 1 metric 1000 100 255 ?
<1-255> EIGRP Effective bandwidth metric (Loading) where 255 is 100% loaded
R2(config-router)#redistribute ospf 1 metric 1000 100 255 1 ?
<1-65535> EIGRP MTU of the path
R2(config-router)#redistribute ospf 1 metric 1000 100 255 1 1500
R2#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1, ospf 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
172.16.0.0
Passive Interface(s):
Serial0/0/1
Routing Information Sources:
Gateway Distance Last Update
172.16.12.1 90 00:16:10
Distance: internal 90 external 170
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 172.16.100.1
It is an area border and autonomous system boundary router
Redistributing External Routes from,
eigrp 1, includes subnets in redistribution
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
Routing on Interfaces Configured Explicitly (Area 0):
Serial0/0/1
Routing on Interfaces Configured Explicitly (Area 10):
Loopback100
Reference bandwidth unit is 100 mbps
Routing Information Sources:
Gateway Distance Last Update
192.168.40.1 110 00:04:06
Distance: (default is 110)
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
D EX 192.168.30.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
D EX 192.168.25.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:24:06, Serial0/0/0
C 172.16.12.0 is directly connected, Serial0/0/0
C 172.16.1.0 is directly connected, Loopback0
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:08:13, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:24:06, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
C 192.168.51.0/24 is directly connected, Loopback51
C 192.168.50.0/24 is directly connected, Loopback50
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:01:16, Serial0/0/0
C 192.168.49.0/24 is directly connected, Loopback49
C 192.168.70.0/24 is directly connected, Loopback70
C 192.168.48.0/24 is directly connected, Loopback48
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:01:16, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:17:20, Null0
R3#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.30.0/24 is directly connected, Loopback30
C 192.168.8.0/24 is directly connected, Loopback8
C 192.168.25.0/24 is directly connected, Loopback25
C 192.168.9.0/24 is directly connected, Loopback9
C 192.168.10.0/24 is directly connected, Loopback10
C 192.168.40.0/24 is directly connected, Loopback40
172.16.0.0/24 is subnetted, 6 subnets
C 172.16.23.0 is directly connected, Serial0/0/1
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:02:58, Serial0/0/1
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:02:58, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:02:58, Serial0/0/1
C 172.16.3.0 is directly connected, Loopback0
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:05:40, Serial0/0/1
C 192.168.11.0/24 is directly connected, Loopback11
C 192.168.20.0/24 is directly connected, Loopback20
O E2 192.168.51.0/24 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
O E2 192.168.50.0/24 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
C 192.168.35.0/24 is directly connected, Loopback35
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:05:41, Null0
O E2 192.168.48.0/23 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
R1#tclsh
R1(tcl)#foreach address {
+>(tcl)#192.168.48.1
+>(tcl)#192.168.49.1
+>(tcl)#192.168.50.1
+>(tcl)#192.168.51.1
+>(tcl)#192.168.70.1
+>(tcl)#172.16.12.1
+>(tcl)#172.16.2.1
+>(tcl)#172.16.100.1
+>(tcl)#172.16.12.2
+>(tcl)#172.16.23.2
+>(tcl)#172.16.3.1
+>(tcl)#192.168.20.1
+>(tcl)#192.168.25.1
+>(tcl)#192.168.30.1
+>(tcl)#192.168.35.1
+>(tcl)#192.168.40.1
+>(tcl)#192.168.8.1
+>(tcl)#192.168.9.1
+>(tcl)#192.168.10.1
+>(tcl)#192.168.11.1
+>(tcl)#172.16.23.3
+>(tcl)#} { ping $address }
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.48.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.49.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.50.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.51.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.70.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.100.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.23.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.25.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/60 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.30.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.35.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.40.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.8.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.9.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/60 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.11.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.23.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
R1#show ip route eigrp
D EX 192.168.30.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0 // FILTER ROUTES USING A ROUTE MAP
D EX 192.168.25.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:26:46, Serial0/0/0
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:10:53, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:26:46, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:19:58, Null0
R2(config)#access-list 1 permit 192.168.25.0
R2(config)#access-list 1 permit 192.168.30.0
R2(config)#route-map SELECTED-DENY ?
<0-65535> Sequence to insert to/delete from existing route-map entry
deny Route map denies set operations
permit Route map permits set operations
<cr>
R2(config)#route-map SELECTED-DENY deny ?
<0-65535> Sequence to insert to/delete from existing route-map entry
<cr>
R2(config)#route-map SELECTED-DENY deny 10
R2(config-route-map)#?
Route Map configuration commands:
continue Continue on a different entry within the route-map
default Set a command to its defaults
description Route-map comment
exit Exit from route-map configuration mode
help Description of the interactive help system
match Match values from routing table
no Negate a command or set its defaults
set Set values in destination routing protocol
R2(config-route-map)#match ?
as-path Match BGP AS path list
clns CLNS information
community Match BGP community list
extcommunity Match BGP/VPN extended community list
interface Match first hop interface of route
ip IP specific information
ipv6 IPv6 specific information
length Packet length
local-preference Local preference for route
mdt-group Match routes corresponding to MDT group
metric Match metric of route
mpls-label Match routes which have MPLS labels
nlri BGP NLRI type
policy-list Match IP policy list
route-type Match route-type of route
source-protocol Match source-protocol of route
tag Match tag of route
R2(config-route-map)#match ip ?
address Match address of route or match packet
next-hop Match next-hop address of route
route-source Match advertising source address of route
R2(config-route-map)#match ip address 1
R2(config-route-map)#route-map SELECTED-DENY permit 20
R2(config)#router eigrp 1
R2(config-router)#redistribute ospf 1 ?
match Redistribution of OSPF routes
metric Metric for redistributed routes
route-map Route map reference
vrf VPN Routing/Forwarding Instance
<cr>
R2(config-router)#redistribute ospf 1 route-map ?
WORD Pointer to route-map entries
R2(config-router)#redistribute ospf 1 route-map SELECTED-DENY
R2#show access-list 1
Standard IP access list 1
10 permit 192.168.25.0 (1 match)
20 permit 192.168.30.0 (1 match)
R2#show route-map
route-map SELECTED-DENY, deny, sequence 10
Match clauses:
ip address (access-lists): 1
Set clauses:
Policy routing matches: 0 packets, 0 bytes
route-map SELECTED-DENY, permit, sequence 20
Match clauses:
Set clauses:
Policy routing matches: 0 packets, 0 bytes
R1#show ip route eigrp // 192.168.25.0/24 AND 192.168.30.0/24 ARE FILTERED VIA THE ROUTE MAP
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:30:29, Serial0/0/0
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:14:35, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:30:29, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:23:41, Null0
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:13:35, Serial0/0/1
O E2 192.168.51.0/24 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 192.168.50.0/24 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:13:35, Null0
O E2 192.168.48.0/23 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
R2(config)#router ospf 1
R2(config-router)#summary-address ?
A.B.C.D IP summary address
R2(config-router)#summary-address 192.168.48.0 ?
A.B.C.D Summary mask
R2(config-router)#summary-address 192.168.48.0 255.255.252.0 // SUMMARIZE EXTERNAL ROUTES AT ASBR
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:15:36, Serial0/0/1
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:15:36, Null0
O E2 192.168.48.0/22 [110/20] via 172.16.23.2, 00:00:37, Serial0/0/1
R1(config)#interface loopback50
R1(config-if)#shutdown
R1(config-if)#
*Dec 21 11:32:20.323: %LINK-5-CHANGED: Interface Loopback50, changed state to administratively down
*Dec 21 11:32:21.323: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback50, changed state to down
R3#traceroute 192.168.50.1
Type escape sequence to abort.
Tracing the route to 192.168.50.1
1 172.16.23.2 12 msec 12 msec 16 msec
2 172.16.23.2 !H !H * // INDICATES NO HOST ROUTE
R2#traceroute 192.168.50.1
Type escape sequence to abort.
Tracing the route to 192.168.50.1
1 * * *
2 * * *
3 * * *
4 * * *
R1#show ip route eigrp
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0 // EIGRP EXTERNAL AD 170
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:39:12, Serial0/0/0 // EIGRP INTERNAL AD 90
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:23:19, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:39:12, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:32:24, Null0
D EX 192.168.48.0/22 [170/40537600] via 172.16.12.2, 00:05:20, Serial0/0/0
R1#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Address Summarization:
192.168.48.0/23 for Serial0/0/0
Summarizing with metric 128256
Maximum path: 4
Routing for Networks:
172.16.0.0
192.168.48.0
192.168.49.0
192.168.50.0
192.168.51.0
192.168.70.0
Routing Information Sources:
Gateway Distance Last Update
(this router) 90 00:33:04
172.16.12.2 90 00:03:57
Distance: internal 90 external 170
R1(config)#router eigrp 1
R1(config-router)#distance ?
<1-255> Administrative distance
eigrp IP-EIGRP distance
R1(config-router)#distance eigrp ?
<1-255> Distance for internal routes
R1(config-router)#distance eigrp 95 ?
<1-255> Distance for external routes
R1(config-router)#distance eigrp 95 165 // LOCALLY SIGNFICANT ON ROUTER
R1(config-router)#
*Dec 21 11:37:11.879: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.2 (Serial0/0/0) is down:route configuration changed
*Dec 21 11:37:16.279: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.2 (Serial0/0/0) is up: new adjacency
R1#show ip route eigrp
D EX 192.168.40.0/24 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [95/41024000] via 172.16.12.2, 00:00:42, Serial0/0/0
D 172.16.2.0 [95/40640000] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 172.16.3.0 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D 172.16.100.0 [95/40640000] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 192.168.20.0/24 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 192.168.35.0/24 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 192.168.8.0/22 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:34:48, Null0
D EX 192.168.48.0/22 [165/40537600] via 172.16.12.2, 00:00:36, Serial0/0/0
R1#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Address Summarization:
192.168.48.0/23 for Serial0/0/0
Summarizing with metric 128256
Maximum path: 4
Routing for Networks:
172.16.0.0
192.168.48.0
192.168.49.0
192.168.50.0
192.168.51.0
192.168.70.0
Routing Information Sources:
Gateway Distance Last Update
172.16.12.2 95 00:01:16
Distance: internal 95 external 165
R2#show ip route eigrp // EIGRP AD RETAINED
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.1.0 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.48.0/23 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:21:36, Serial0/0/1 // OSPF DEFAULT AD 110
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:02:13, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:21:36, Serial0/0/1
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:24:18, Serial0/0/1
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:02:13, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:24:18, Null0
O E2 192.168.48.0/22 [110/20] via 172.16.23.2, 00:02:11, Serial0/0/1
R3(config)#router ospf 1
R3(config-router)#distance ?
<1-255> Administrative distance
ospf OSPF distance
R3(config-router)#distance ospf ?
external External type 5 and type 7 routes
inter-area Inter-area routes
intra-area Intra-area routes
R3(config-router)#distance ospf intra-area ?
<1-255> Distance for intra-area routes
R3(config-router)#distance ospf intra-area 105 ?
external External type 5 and type 7 routes
inter-area Inter-area routes
<cr>
R3(config-router)#distance ospf intra-area 105 inter-area ?
<1-255> Distance for inter-area routes
R3(config-router)#distance ospf intra-area 105 inter-area 115 ?
external External type 5 and type 7 routes
<cr>
R3(config-router)#distance ospf intra-area 105 inter-area 115 external ?
<1-255> Distance for external type 5 and type 7 routes
R3(config-router)#distance ospf intra-area 105 inter-area 115 external 175
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O E2 172.16.1.0 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O E2 172.16.2.0 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O IA 172.16.100.0 [115/1563] via 172.16.23.2, 00:00:18, Serial0/0/1
O E2 192.168.70.0/24 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:00:18, Null0
O E2 192.168.48.0/22 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
R3#show ip protocols
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 192.168.40.1
It is an area border router
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
Routing on Interfaces Configured Explicitly (Area 0):
Loopback0
Loopback20
Loopback25
Loopback30
Loopback35
Loopback40
Serial0/0/1
Routing on Interfaces Configured Explicitly (Area 20):
Loopback8
Loopback9
Loopback10
Loopback11
Reference bandwidth unit is 100 mbps
Routing Information Sources:
Gateway Distance Last Update
192.168.40.1 110 00:00:29
172.16.100.1 110 00:00:29
Distance: (default is 105)
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
D EX 192.168.40.0/24 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [95/41024000] via 172.16.12.2, 00:05:14, Serial0/0/0
C 172.16.12.0 is directly connected, Serial0/0/0
C 172.16.1.0 is directly connected, Loopback0
D 172.16.2.0 [95/40640000] via 172.16.12.2, 00:05:14, Serial0/0/0
D EX 172.16.3.0 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
D 172.16.100.0 [95/40640000] via 172.16.12.2, 00:05:14, Serial0/0/0
D EX 192.168.20.0/24 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
C 192.168.51.0/24 is directly connected, Loopback51
C 192.168.50.0/24 is directly connected, Loopback50
D EX 192.168.35.0/24 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
C 192.168.49.0/24 is directly connected, Loopback49
C 192.168.70.0/24 is directly connected, Loopback70
C 192.168.48.0/24 is directly connected, Loopback48
D EX 192.168.8.0/22 [165/40537600] via 172.16.12.2, 00:05:16, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:39:22, Null0
D EX 192.168.48.0/22 [165/40537600] via 172.16.12.2, 00:05:10, Serial0/0/0
R1(config)#interface loopback 50
R1(config-if)#shutdown
*Dec 21 11:43:07.367: %LINK-5-CHANGED: Interface Loopback50, changed state to administratively down
*Dec 21 11:43:08.367: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback50, changed state to down
R1#show ip route // 192.168.50.0/24 IS NOT IN ROUTING TABLE
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
D EX 192.168.40.0/24 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [95/41024000] via 172.16.12.2, 00:05:55, Serial0/0/0
C 172.16.12.0 is directly connected, Serial0/0/0
C 172.16.1.0 is directly connected, Loopback0
D 172.16.2.0 [95/40640000] via 172.16.12.2, 00:05:55, Serial0/0/0
D EX 172.16.3.0 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
D 172.16.100.0 [95/40640000] via 172.16.12.2, 00:05:55, Serial0/0/0
D EX 192.168.20.0/24 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
C 192.168.51.0/24 is directly connected, Loopback51
D EX 192.168.35.0/24 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
C 192.168.49.0/24 is directly connected, Loopback49
C 192.168.70.0/24 is directly connected, Loopback70
C 192.168.48.0/24 is directly connected, Loopback48
D EX 192.168.8.0/22 [165/40537600] via 172.16.12.2, 00:06:17, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:40:22, Null0
D EX 192.168.48.0/22 [165/40537600] via 172.16.12.2, 00:06:10, Serial0/0/0
R2#debug ip packet
IP packet debugging is on
*Dec 21 10:27:13.183: IP: tableid=0, s=0.0.0.0 (local), d=192.168.50.1 (Null0), routed via RIB
*Dec 21 10:27:13.183: IP: s=172.16.100.1 (local), d=192.168.50.1 (Null0), len 100, sending
R3#show ip route 192.168.50.1
Routing entry for 192.168.48.0/22, supernet
Known via "ospf 1", distance 175, metric 20, type extern 2, forward metric 1562
Last update from 172.16.23.2 on Serial0/0/1, 00:06:21 ago
Routing Descriptor Blocks:
* 172.16.23.2, from 172.16.100.1, 00:06:21 ago, via Serial0/0/1
Route metric is 20, traffic share count is 1
R3#debug ip icmp
ICMP packet debugging is on
R3#debug ip packet
IP packet debugging is on
R3#ping 192.1
*Dec 21 11:06:47.435: IP: s=172.16.23.3 (local), d=224.0.0.5 (Serial0/0/1), len 80, sending
broad/multicast
*Dec 21 11:06:47.435: IP: s=172.16.23.3 (local), d=224.0.0.5 (Serial0/0/1), len 80, sending full packet68.50.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.50.1, timeout is 2 seconds:
U
*Dec 21 11:06:50.731: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:50.731: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet
*Dec 21 11:06:50.755: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, input feature, MCI
Check(64), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE
*Dec 21 11:06:50.755: IP: tableid=0, s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), routed
via RIB
*Dec 21 11:06:50.755: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), len 56, rcvd 3
*Dec 21 11:06:50.755: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, stop process pak for
forus packet
*Dec 21 11:06:50.755: ICMP: dst (172.16.23.3) host unreachable rcv from 172.16.23.2
*Dec 21 11:06:50.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:50.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet.U
*Dec 21 11:06:52.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:52.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet
*Dec 21 11:06:52.775: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, input feature, MCI
Check(64), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE
*Dec 21 11:06:52.779: IP: tableid=0, s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), routed
via RIB
*Dec 21 11:06:52.779: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), len 56, rcvd 3
*Dec 21 11:06:52.779: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, stop process pak for
forus packet
*Dec 21 11:06:52.779: ICMP: dst (172.16.23.3) host unreachable rcv from 172.16.23.2
*Dec 21 11:06:52.779: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:52.779: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet
*Dec 21 11:06:53.223: IP: s=172.16.23.2 (Serial0/0/1), d=224.0.0.5, len 80, rcvd 0
*Dec 21 11:06:53.223: pak 65AA1980 consumed in input feature , packet consumed, MCI Check(64), rtype
0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE.U
Success rate is 0 percent (0/5)
R3#telnet 192.168.50.1
Trying 192.168.50.1 ...
% Destination unreachable; gateway or host down // ROUTE BLACKHOLE ISSUE
I'm already halfway through my quick CCDP journey and performing the ROUTE labs helped me reinforce some of the advance routing concepts. I'll be doing labs for CCNP SWITCH next and I'm currently modifying my home lab.
In this lab, I did a redistribution between EIGRP and OSPF. Redistribution is very common in an enterprise especially if there's an acquisition or merger between companies. At work, we've got different redistribution points, such as between RIP and OSPF as well as OSPF and BGP.
R1(config)#router eigrp 1
R1(config-router)#no auto-summary
R1(config-router)#network 172.16.0.0
R1(config-router)#network 192.168.48.0
R1(config-router)#network 192.168.49.0
R1(config-router)#network 192.168.50.0
R1(config-router)#network 192.168.51.0
R1(config-router)#network 192.168.70.0
R1#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.12.2 Se0/0/0 11 00:00:48 27 2280 0 3
R1#show ip route eigrp
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:00:52, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:00:52, Serial0/0/0
R2(config)#router eigrp 1
R2(config-router)#no auto-summary
R2(config-router)#network 172.16.0.0
R2(config-router)#
*Dec 21 09:38:46.827: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.1 (Serial0/0/0) is up: new adjacency
R2#show ip eigrp neighbors
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 172.16.12.1 Se0/0/0 13 00:00:11 38 2280 0 3
R2#show ip route eigrp
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.1.0 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.49.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
D 192.168.48.0/24 [90/40640000] via 172.16.12.1, 00:00:18, Serial0/0/0
R2#show ip eigrp ?
<1-65535> Autonomous System
accounting IP-EIGRP Accounting
interfaces IP-EIGRP interfaces
neighbors IP-EIGRP neighbors
topology IP-EIGRP Topology Table
traffic IP-EIGRP Traffic Statistics
vrf Select a VPN Routing/Forwarding instance
R2#show ip eigrp interfaces // BOTH SERIAL INTERFACES ARE ENABLED FOR EIGRP BECAUSE OF CLASSFUL NETWORK COMMAND USED
IP-EIGRP interfaces for process 1
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se0/0/0 1 0/0 38 10/380 552 0
Se0/0/1 0 0/0 0 10/10 0 0
Lo100 0 0/0 0 0/1 0 0
R2(config)#router eigrp 1
R2(config-router)#passive-interface serial0/0/1
R2#show ip eigrp interfaces
IP-EIGRP interfaces for process 1
Xmit Queue Mean Pacing Time Multicast Pending
Interface Peers Un/Reliable SRTT Un/Reliable Flow Timer Routes
Se0/0/0 1 0/0 38 10/380 552 0
Lo100 0 0/0 0 0/1 0 0
R2#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
172.16.0.0
Passive Interface(s):
Serial0/0/1
Routing Information Sources:
Gateway Distance Last Update
172.16.12.1 90 00:04:08
Distance: internal 90 external 170
R1(config)#interface s0/0/0
R1(config-if)#ip summary-address ?
eigrp Enhanced Interior Gateway Routing Protocol (EIGRP)
rip Routing Information Protocol (RIP)
R1(config-if)#ip summary-address eigrp ?
<1-65535> Autonomous system number
R1(config-if)#ip summary-address eigrp 1 ?
A.B.C.D IP address
R1(config-if)#ip summary-address eigrp 1 192.168.48.0 ?
A.B.C.D IP network mask
R1(config-if)#ip summary-address eigrp 1 192.168.48.0 255.255.254.0
R1(config-if)#
*Dec 21 11:03:10.863: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.2 (Serial0/0/0) is resync:summary configured
R1#show ip route eigrp
172.16.0.0/24 is subnetted, 4 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:07:08, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:07:08, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:00:20, Null0
R1#show ip route 192.168.48.0 255.255.254.0
Routing entry for 192.168.48.0/23, supernet
Known via "eigrp 1", distance 5, metric 128256, type internal
Redistributing via eigrp 1
Routing Descriptor Blocks:
* directly connected, via Null0
Route metric is 128256, traffic share count is 1
Total delay is 5000 microseconds, minimum bandwidth is 10000000 Kbit
Reliability 255/255, minimum MTU 1514 bytes
Loading 1/255, Hops 0
R2(config)#interface loopback100
R2(config-if)#ip ospf 1 area 10
R2(config-if)#ip ospf network point-to-point
R2(config-if)#interface s0/0/1
R2(config-if)#ip ospf 1 area 0
*Dec 21 09:49:06.715: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.40.1 on Serial0/0/1 from LOADING to FULL, Loading Done
R2#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
192.168.40.1 0 FULL/ - 00:00:36 172.16.23.3 Serial0/0/1
R3(config)#interface s0/0/1
R3(config-if)#ip ospf 1 area 0
R3(config-if)#interface loopback0
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback20
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback25
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback30
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback35
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback40
R3(config-if)#ip ospf 1 area 0
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback8
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback9
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback10
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3(config-if)#interface loopback11
R3(config-if)#ip ospf 1 area 20
R3(config-if)#ip ospf network point-to-point
R3#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
172.16.100.1 0 FULL/ - 00:00:31 172.16.23.2 Serial0/0/1
R2#show ip route ospf
O 192.168.30.0/24 [110/1563] via 172.16.23.3, 00:04:44, Serial0/0/1
O IA 192.168.8.0/24 [110/1563] via 172.16.23.3, 00:03:50, Serial0/0/1
O 192.168.25.0/24 [110/1563] via 172.16.23.3, 00:04:44, Serial0/0/1
O IA 192.168.9.0/24 [110/1563] via 172.16.23.3, 00:03:50, Serial0/0/1
O IA 192.168.10.0/24 [110/1563] via 172.16.23.3, 00:03:40, Serial0/0/1
O 192.168.40.0/24 [110/1563] via 172.16.23.3, 00:04:24, Serial0/0/1
172.16.0.0/24 is subnetted, 6 subnets
O 172.16.3.0 [110/1563] via 172.16.23.3, 00:05:04, Serial0/0/1
O IA 192.168.11.0/24 [110/1563] via 172.16.23.3, 00:03:40, Serial0/0/1
O 192.168.20.0/24 [110/1563] via 172.16.23.3, 00:04:54, Serial0/0/1
O 192.168.35.0/24 [110/1563] via 172.16.23.3, 00:04:34, Serial0/0/1
R2#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
O 192.168.30.0/24 [110/1563] via 172.16.23.3, 00:06:10, Serial0/0/1
O IA 192.168.8.0/24 [110/1563] via 172.16.23.3, 00:05:16, Serial0/0/1
O 192.168.25.0/24 [110/1563] via 172.16.23.3, 00:06:10, Serial0/0/1
O IA 192.168.9.0/24 [110/1563] via 172.16.23.3, 00:05:16, Serial0/0/1
O IA 192.168.10.0/24 [110/1563] via 172.16.23.3, 00:05:06, Serial0/0/1
O 192.168.40.0/24 [110/1563] via 172.16.23.3, 00:05:50, Serial0/0/1
172.16.0.0/24 is subnetted, 6 subnets
C 172.16.23.0 is directly connected, Serial0/0/1
C 172.16.12.0 is directly connected, Serial0/0/0
D 172.16.1.0 [90/40640000] via 172.16.12.1, 00:17:46, Serial0/0/0
C 172.16.2.0 is directly connected, Loopback0
O 172.16.3.0 [110/1563] via 172.16.23.3, 00:06:30, Serial0/0/1
C 172.16.100.0 is directly connected, Loopback100
O IA 192.168.11.0/24 [110/1563] via 172.16.23.3, 00:05:08, Serial0/0/1
O 192.168.20.0/24 [110/1563] via 172.16.23.3, 00:06:22, Serial0/0/1
D 192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:17:48, Serial0/0/0
D 192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:17:48, Serial0/0/0
O 192.168.35.0/24 [110/1563] via 172.16.23.3, 00:06:02, Serial0/0/1
D 192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:17:48, Serial0/0/0
D 192.168.48.0/23 [90/40640000] via 172.16.12.1, 00:11:00, Serial0/0/0
R3(config)#router ospf 1
R3(config-router)#area 20 ?
authentication Enable authentication
default-cost Set the summary default-cost of a NSSA/stub area
filter-list Filter networks between OSPF areas
nssa Specify a NSSA area
range Summarize routes matching address/mask (border routers only)
sham-link Define a sham link and its parameters
stub Specify a stub area
virtual-link Define a virtual link and its parameters
R3(config-router)#area 20 range ?
A.B.C.D IP address to match
R3(config-router)#area 20 range 192.168.8.0 ?
A.B.C.D IP mask for address
R3(config-router)#area 20 range 192.168.8.0 255.255.252.0
R2#show ip route ospf
O 192.168.30.0/24 [110/1563] via 172.16.23.3, 00:07:28, Serial0/0/1
O 192.168.25.0/24 [110/1563] via 172.16.23.3, 00:07:28, Serial0/0/1
O 192.168.40.0/24 [110/1563] via 172.16.23.3, 00:07:08, Serial0/0/1
172.16.0.0/24 is subnetted, 6 subnets
O 172.16.3.0 [110/1563] via 172.16.23.3, 00:07:48, Serial0/0/1
O 192.168.20.0/24 [110/1563] via 172.16.23.3, 00:07:38, Serial0/0/1
O 192.168.35.0/24 [110/1563] via 172.16.23.3, 00:07:18, Serial0/0/1
O IA 192.168.8.0/22 [110/1563] via 172.16.23.3, 00:00:11, Serial0/0/1
R2(config)#router ospf 1
R2(config-router)#redistribute ?
bgp Border Gateway Protocol (BGP)
connected Connected
eigrp Enhanced Interior Gateway Routing Protocol (EIGRP)
isis ISO IS-IS
iso-igrp IGRP for OSI networks
maximum-prefix Maximum number of prefixes redistributed to protocol
metric Metric for redistributed routes
metric-type OSPF/IS-IS exterior metric type for redistributed routes
mobile Mobile routes
odr On Demand stub Routes
ospf Open Shortest Path First (OSPF)
rip Routing Information Protocol (RIP)
route-map Route map reference
static Static routes
subnets Consider subnets for redistribution into OSPF
tag Set tag for routes redistributed into OSPF
<cr>
R2(config-router)#redistribute eigrp ?
<1-65535> Autonomous system number
R2(config-router)#redistribute eigrp 1 ?
metric Metric for redistributed routes
metric-type OSPF/IS-IS exterior metric type for redistributed routes
route-map Route map reference
subnets Consider subnets for redistribution into OSPF
tag Set tag for routes redistributed into OSPF
<cr>
R2(config-router)#redistribute eigrp 1 subnets
R2(config)#router eigrp 1
R2(config-router)#redistribute ospf ?
<1-65535> Process ID
R2(config-router)#redistribute ospf 1 ?
match Redistribution of OSPF routes
metric Metric for redistributed routes
route-map Route map reference
vrf VPN Routing/Forwarding Instance
<cr>
R2(config-router)#redistribute ospf 1 metric ?
<1-4294967295> Bandwidth metric in Kbits per second
R2(config-router)#redistribute ospf 1 metric 1000 ?
<0-4294967295> EIGRP delay metric, in 10 microsecond units
R2(config-router)#redistribute ospf 1 metric 1000 100 ?
<0-255> EIGRP reliability metric where 255 is 100% reliable
R2(config-router)#redistribute ospf 1 metric 1000 100 255 ?
<1-255> EIGRP Effective bandwidth metric (Loading) where 255 is 100% loaded
R2(config-router)#redistribute ospf 1 metric 1000 100 255 1 ?
<1-65535> EIGRP MTU of the path
R2(config-router)#redistribute ospf 1 metric 1000 100 255 1 1500
R2#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1, ospf 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
172.16.0.0
Passive Interface(s):
Serial0/0/1
Routing Information Sources:
Gateway Distance Last Update
172.16.12.1 90 00:16:10
Distance: internal 90 external 170
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 172.16.100.1
It is an area border and autonomous system boundary router
Redistributing External Routes from,
eigrp 1, includes subnets in redistribution
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
Routing on Interfaces Configured Explicitly (Area 0):
Serial0/0/1
Routing on Interfaces Configured Explicitly (Area 10):
Loopback100
Reference bandwidth unit is 100 mbps
Routing Information Sources:
Gateway Distance Last Update
192.168.40.1 110 00:04:06
Distance: (default is 110)
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
D EX 192.168.30.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
D EX 192.168.25.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:24:06, Serial0/0/0
C 172.16.12.0 is directly connected, Serial0/0/0
C 172.16.1.0 is directly connected, Loopback0
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:08:13, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:24:06, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:01:14, Serial0/0/0
C 192.168.51.0/24 is directly connected, Loopback51
C 192.168.50.0/24 is directly connected, Loopback50
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:01:16, Serial0/0/0
C 192.168.49.0/24 is directly connected, Loopback49
C 192.168.70.0/24 is directly connected, Loopback70
C 192.168.48.0/24 is directly connected, Loopback48
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:01:16, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:17:20, Null0
R3#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.30.0/24 is directly connected, Loopback30
C 192.168.8.0/24 is directly connected, Loopback8
C 192.168.25.0/24 is directly connected, Loopback25
C 192.168.9.0/24 is directly connected, Loopback9
C 192.168.10.0/24 is directly connected, Loopback10
C 192.168.40.0/24 is directly connected, Loopback40
172.16.0.0/24 is subnetted, 6 subnets
C 172.16.23.0 is directly connected, Serial0/0/1
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:02:58, Serial0/0/1
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:02:58, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:02:58, Serial0/0/1
C 172.16.3.0 is directly connected, Loopback0
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:05:40, Serial0/0/1
C 192.168.11.0/24 is directly connected, Loopback11
C 192.168.20.0/24 is directly connected, Loopback20
O E2 192.168.51.0/24 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
O E2 192.168.50.0/24 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
C 192.168.35.0/24 is directly connected, Loopback35
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:05:41, Null0
O E2 192.168.48.0/23 [110/20] via 172.16.23.2, 00:03:00, Serial0/0/1
R1#tclsh
R1(tcl)#foreach address {
+>(tcl)#192.168.48.1
+>(tcl)#192.168.49.1
+>(tcl)#192.168.50.1
+>(tcl)#192.168.51.1
+>(tcl)#192.168.70.1
+>(tcl)#172.16.12.1
+>(tcl)#172.16.2.1
+>(tcl)#172.16.100.1
+>(tcl)#172.16.12.2
+>(tcl)#172.16.23.2
+>(tcl)#172.16.3.1
+>(tcl)#192.168.20.1
+>(tcl)#192.168.25.1
+>(tcl)#192.168.30.1
+>(tcl)#192.168.35.1
+>(tcl)#192.168.40.1
+>(tcl)#192.168.8.1
+>(tcl)#192.168.9.1
+>(tcl)#192.168.10.1
+>(tcl)#192.168.11.1
+>(tcl)#172.16.23.3
+>(tcl)#} { ping $address }
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.48.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.49.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.50.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.51.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.70.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.100.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.23.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.3.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.25.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/60 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.30.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.35.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.40.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.8.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.9.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/60 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.11.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.23.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 56/56/56 ms
R1#show ip route eigrp
D EX 192.168.30.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0 // FILTER ROUTES USING A ROUTE MAP
D EX 192.168.25.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:26:46, Serial0/0/0
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:10:53, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:26:46, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:03:54, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:19:58, Null0
R2(config)#access-list 1 permit 192.168.25.0
R2(config)#access-list 1 permit 192.168.30.0
R2(config)#route-map SELECTED-DENY ?
<0-65535> Sequence to insert to/delete from existing route-map entry
deny Route map denies set operations
permit Route map permits set operations
<cr>
R2(config)#route-map SELECTED-DENY deny ?
<0-65535> Sequence to insert to/delete from existing route-map entry
<cr>
R2(config)#route-map SELECTED-DENY deny 10
R2(config-route-map)#?
Route Map configuration commands:
continue Continue on a different entry within the route-map
default Set a command to its defaults
description Route-map comment
exit Exit from route-map configuration mode
help Description of the interactive help system
match Match values from routing table
no Negate a command or set its defaults
set Set values in destination routing protocol
R2(config-route-map)#match ?
as-path Match BGP AS path list
clns CLNS information
community Match BGP community list
extcommunity Match BGP/VPN extended community list
interface Match first hop interface of route
ip IP specific information
ipv6 IPv6 specific information
length Packet length
local-preference Local preference for route
mdt-group Match routes corresponding to MDT group
metric Match metric of route
mpls-label Match routes which have MPLS labels
nlri BGP NLRI type
policy-list Match IP policy list
route-type Match route-type of route
source-protocol Match source-protocol of route
tag Match tag of route
R2(config-route-map)#match ip ?
address Match address of route or match packet
next-hop Match next-hop address of route
route-source Match advertising source address of route
R2(config-route-map)#match ip address 1
R2(config-route-map)#route-map SELECTED-DENY permit 20
R2(config)#router eigrp 1
R2(config-router)#redistribute ospf 1 ?
match Redistribution of OSPF routes
metric Metric for redistributed routes
route-map Route map reference
vrf VPN Routing/Forwarding Instance
<cr>
R2(config-router)#redistribute ospf 1 route-map ?
WORD Pointer to route-map entries
R2(config-router)#redistribute ospf 1 route-map SELECTED-DENY
R2#show access-list 1
Standard IP access list 1
10 permit 192.168.25.0 (1 match)
20 permit 192.168.30.0 (1 match)
R2#show route-map
route-map SELECTED-DENY, deny, sequence 10
Match clauses:
ip address (access-lists): 1
Set clauses:
Policy routing matches: 0 packets, 0 bytes
route-map SELECTED-DENY, permit, sequence 20
Match clauses:
Set clauses:
Policy routing matches: 0 packets, 0 bytes
R1#show ip route eigrp // 192.168.25.0/24 AND 192.168.30.0/24 ARE FILTERED VIA THE ROUTE MAP
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:30:29, Serial0/0/0
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:14:35, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:30:29, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:07:36, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:23:41, Null0
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:13:35, Serial0/0/1
O E2 192.168.51.0/24 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 192.168.50.0/24 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:13:35, Null0
O E2 192.168.48.0/23 [110/20] via 172.16.23.2, 00:10:53, Serial0/0/1
R2(config)#router ospf 1
R2(config-router)#summary-address ?
A.B.C.D IP summary address
R2(config-router)#summary-address 192.168.48.0 ?
A.B.C.D Summary mask
R2(config-router)#summary-address 192.168.48.0 255.255.252.0 // SUMMARIZE EXTERNAL ROUTES AT ASBR
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:15:36, Serial0/0/1
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:12:54, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:15:36, Null0
O E2 192.168.48.0/22 [110/20] via 172.16.23.2, 00:00:37, Serial0/0/1
R1(config)#interface loopback50
R1(config-if)#shutdown
R1(config-if)#
*Dec 21 11:32:20.323: %LINK-5-CHANGED: Interface Loopback50, changed state to administratively down
*Dec 21 11:32:21.323: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback50, changed state to down
R3#traceroute 192.168.50.1
Type escape sequence to abort.
Tracing the route to 192.168.50.1
1 172.16.23.2 12 msec 12 msec 16 msec
2 172.16.23.2 !H !H * // INDICATES NO HOST ROUTE
R2#traceroute 192.168.50.1
Type escape sequence to abort.
Tracing the route to 192.168.50.1
1 * * *
2 * * *
3 * * *
4 * * *
R1#show ip route eigrp
D EX 192.168.40.0/24 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0 // EIGRP EXTERNAL AD 170
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [90/41024000] via 172.16.12.2, 00:39:12, Serial0/0/0 // EIGRP INTERNAL AD 90
D 172.16.2.0 [90/40640000] via 172.16.12.2, 00:23:19, Serial0/0/0
D EX 172.16.3.0 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D 172.16.100.0 [90/40640000] via 172.16.12.2, 00:39:12, Serial0/0/0
D EX 192.168.20.0/24 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D EX 192.168.35.0/24 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D EX 192.168.8.0/22 [170/40537600] via 172.16.12.2, 00:16:20, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:32:24, Null0
D EX 192.168.48.0/22 [170/40537600] via 172.16.12.2, 00:05:20, Serial0/0/0
R1#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Address Summarization:
192.168.48.0/23 for Serial0/0/0
Summarizing with metric 128256
Maximum path: 4
Routing for Networks:
172.16.0.0
192.168.48.0
192.168.49.0
192.168.50.0
192.168.51.0
192.168.70.0
Routing Information Sources:
Gateway Distance Last Update
(this router) 90 00:33:04
172.16.12.2 90 00:03:57
Distance: internal 90 external 170
R1(config)#router eigrp 1
R1(config-router)#distance ?
<1-255> Administrative distance
eigrp IP-EIGRP distance
R1(config-router)#distance eigrp ?
<1-255> Distance for internal routes
R1(config-router)#distance eigrp 95 ?
<1-255> Distance for external routes
R1(config-router)#distance eigrp 95 165 // LOCALLY SIGNFICANT ON ROUTER
R1(config-router)#
*Dec 21 11:37:11.879: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.2 (Serial0/0/0) is down:route configuration changed
*Dec 21 11:37:16.279: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 1: Neighbor 172.16.12.2 (Serial0/0/0) is up: new adjacency
R1#show ip route eigrp
D EX 192.168.40.0/24 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [95/41024000] via 172.16.12.2, 00:00:42, Serial0/0/0
D 172.16.2.0 [95/40640000] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 172.16.3.0 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D 172.16.100.0 [95/40640000] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 192.168.20.0/24 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 192.168.35.0/24 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D EX 192.168.8.0/22 [165/40537600] via 172.16.12.2, 00:00:42, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:34:48, Null0
D EX 192.168.48.0/22 [165/40537600] via 172.16.12.2, 00:00:36, Serial0/0/0
R1#show ip protocols
Routing Protocol is "eigrp 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 1
EIGRP NSF-aware route hold timer is 240s
Automatic network summarization is not in effect
Address Summarization:
192.168.48.0/23 for Serial0/0/0
Summarizing with metric 128256
Maximum path: 4
Routing for Networks:
172.16.0.0
192.168.48.0
192.168.49.0
192.168.50.0
192.168.51.0
192.168.70.0
Routing Information Sources:
Gateway Distance Last Update
172.16.12.2 95 00:01:16
Distance: internal 95 external 165
R2#show ip route eigrp // EIGRP AD RETAINED
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.1.0 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.51.0/24 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.50.0/24 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.70.0/24 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
D 192.168.48.0/23 [90/40640000] via 172.16.12.1, 00:01:00, Serial0/0/0
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [110/20] via 172.16.23.2, 00:21:36, Serial0/0/1 // OSPF DEFAULT AD 110
O E2 172.16.1.0 [110/20] via 172.16.23.2, 00:02:13, Serial0/0/1
O E2 172.16.2.0 [110/20] via 172.16.23.2, 00:21:36, Serial0/0/1
O IA 172.16.100.0 [110/1563] via 172.16.23.2, 00:24:18, Serial0/0/1
O E2 192.168.70.0/24 [110/20] via 172.16.23.2, 00:02:13, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:24:18, Null0
O E2 192.168.48.0/22 [110/20] via 172.16.23.2, 00:02:11, Serial0/0/1
R3(config)#router ospf 1
R3(config-router)#distance ?
<1-255> Administrative distance
ospf OSPF distance
R3(config-router)#distance ospf ?
external External type 5 and type 7 routes
inter-area Inter-area routes
intra-area Intra-area routes
R3(config-router)#distance ospf intra-area ?
<1-255> Distance for intra-area routes
R3(config-router)#distance ospf intra-area 105 ?
external External type 5 and type 7 routes
inter-area Inter-area routes
<cr>
R3(config-router)#distance ospf intra-area 105 inter-area ?
<1-255> Distance for inter-area routes
R3(config-router)#distance ospf intra-area 105 inter-area 115 ?
external External type 5 and type 7 routes
<cr>
R3(config-router)#distance ospf intra-area 105 inter-area 115 external ?
<1-255> Distance for external type 5 and type 7 routes
R3(config-router)#distance ospf intra-area 105 inter-area 115 external 175
R3#show ip route ospf
172.16.0.0/24 is subnetted, 6 subnets
O E2 172.16.12.0 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O E2 172.16.1.0 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O E2 172.16.2.0 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O IA 172.16.100.0 [115/1563] via 172.16.23.2, 00:00:18, Serial0/0/1
O E2 192.168.70.0/24 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
O 192.168.8.0/22 is a summary, 00:00:18, Null0
O E2 192.168.48.0/22 [175/20] via 172.16.23.2, 00:00:18, Serial0/0/1
R3#show ip protocols
Routing Protocol is "ospf 1"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Router ID 192.168.40.1
It is an area border router
Number of areas in this router is 2. 2 normal 0 stub 0 nssa
Maximum path: 4
Routing for Networks:
Routing on Interfaces Configured Explicitly (Area 0):
Loopback0
Loopback20
Loopback25
Loopback30
Loopback35
Loopback40
Serial0/0/1
Routing on Interfaces Configured Explicitly (Area 20):
Loopback8
Loopback9
Loopback10
Loopback11
Reference bandwidth unit is 100 mbps
Routing Information Sources:
Gateway Distance Last Update
192.168.40.1 110 00:00:29
172.16.100.1 110 00:00:29
Distance: (default is 105)
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
D EX 192.168.40.0/24 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [95/41024000] via 172.16.12.2, 00:05:14, Serial0/0/0
C 172.16.12.0 is directly connected, Serial0/0/0
C 172.16.1.0 is directly connected, Loopback0
D 172.16.2.0 [95/40640000] via 172.16.12.2, 00:05:14, Serial0/0/0
D EX 172.16.3.0 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
D 172.16.100.0 [95/40640000] via 172.16.12.2, 00:05:14, Serial0/0/0
D EX 192.168.20.0/24 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
C 192.168.51.0/24 is directly connected, Loopback51
C 192.168.50.0/24 is directly connected, Loopback50
D EX 192.168.35.0/24 [165/40537600] via 172.16.12.2, 00:05:14, Serial0/0/0
C 192.168.49.0/24 is directly connected, Loopback49
C 192.168.70.0/24 is directly connected, Loopback70
C 192.168.48.0/24 is directly connected, Loopback48
D EX 192.168.8.0/22 [165/40537600] via 172.16.12.2, 00:05:16, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:39:22, Null0
D EX 192.168.48.0/22 [165/40537600] via 172.16.12.2, 00:05:10, Serial0/0/0
R1(config)#interface loopback 50
R1(config-if)#shutdown
*Dec 21 11:43:07.367: %LINK-5-CHANGED: Interface Loopback50, changed state to administratively down
*Dec 21 11:43:08.367: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback50, changed state to down
R1#show ip route // 192.168.50.0/24 IS NOT IN ROUTING TABLE
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
D EX 192.168.40.0/24 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
172.16.0.0/24 is subnetted, 6 subnets
D 172.16.23.0 [95/41024000] via 172.16.12.2, 00:05:55, Serial0/0/0
C 172.16.12.0 is directly connected, Serial0/0/0
C 172.16.1.0 is directly connected, Loopback0
D 172.16.2.0 [95/40640000] via 172.16.12.2, 00:05:55, Serial0/0/0
D EX 172.16.3.0 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
D 172.16.100.0 [95/40640000] via 172.16.12.2, 00:05:55, Serial0/0/0
D EX 192.168.20.0/24 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
C 192.168.51.0/24 is directly connected, Loopback51
D EX 192.168.35.0/24 [165/40537600] via 172.16.12.2, 00:05:55, Serial0/0/0
C 192.168.49.0/24 is directly connected, Loopback49
C 192.168.70.0/24 is directly connected, Loopback70
C 192.168.48.0/24 is directly connected, Loopback48
D EX 192.168.8.0/22 [165/40537600] via 172.16.12.2, 00:06:17, Serial0/0/0
D 192.168.48.0/23 is a summary, 00:40:22, Null0
D EX 192.168.48.0/22 [165/40537600] via 172.16.12.2, 00:06:10, Serial0/0/0
R2#debug ip packet
IP packet debugging is on
*Dec 21 10:27:13.183: IP: tableid=0, s=0.0.0.0 (local), d=192.168.50.1 (Null0), routed via RIB
*Dec 21 10:27:13.183: IP: s=172.16.100.1 (local), d=192.168.50.1 (Null0), len 100, sending
R3#show ip route 192.168.50.1
Routing entry for 192.168.48.0/22, supernet
Known via "ospf 1", distance 175, metric 20, type extern 2, forward metric 1562
Last update from 172.16.23.2 on Serial0/0/1, 00:06:21 ago
Routing Descriptor Blocks:
* 172.16.23.2, from 172.16.100.1, 00:06:21 ago, via Serial0/0/1
Route metric is 20, traffic share count is 1
R3#debug ip icmp
ICMP packet debugging is on
R3#debug ip packet
IP packet debugging is on
R3#ping 192.1
*Dec 21 11:06:47.435: IP: s=172.16.23.3 (local), d=224.0.0.5 (Serial0/0/1), len 80, sending
broad/multicast
*Dec 21 11:06:47.435: IP: s=172.16.23.3 (local), d=224.0.0.5 (Serial0/0/1), len 80, sending full packet68.50.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.50.1, timeout is 2 seconds:
U
*Dec 21 11:06:50.731: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:50.731: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet
*Dec 21 11:06:50.755: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, input feature, MCI
Check(64), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE
*Dec 21 11:06:50.755: IP: tableid=0, s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), routed
via RIB
*Dec 21 11:06:50.755: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), len 56, rcvd 3
*Dec 21 11:06:50.755: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, stop process pak for
forus packet
*Dec 21 11:06:50.755: ICMP: dst (172.16.23.3) host unreachable rcv from 172.16.23.2
*Dec 21 11:06:50.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:50.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet.U
*Dec 21 11:06:52.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:52.755: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet
*Dec 21 11:06:52.775: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, input feature, MCI
Check(64), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE
*Dec 21 11:06:52.779: IP: tableid=0, s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), routed
via RIB
*Dec 21 11:06:52.779: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3 (Serial0/0/1), len 56, rcvd 3
*Dec 21 11:06:52.779: IP: s=172.16.23.2 (Serial0/0/1), d=172.16.23.3, len 56, stop process pak for
forus packet
*Dec 21 11:06:52.779: ICMP: dst (172.16.23.3) host unreachable rcv from 172.16.23.2
*Dec 21 11:06:52.779: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending
*Dec 21 11:06:52.779: IP: s=172.16.23.3 (local), d=192.168.50.1 (Serial0/0/1), len 100, sending full
packet
*Dec 21 11:06:53.223: IP: s=172.16.23.2 (Serial0/0/1), d=224.0.0.5, len 80, rcvd 0
*Dec 21 11:06:53.223: pak 65AA1980 consumed in input feature , packet consumed, MCI Check(64), rtype
0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE.U
Success rate is 0 percent (0/5)
R3#telnet 192.168.50.1
Trying 192.168.50.1 ...
% Destination unreachable; gateway or host down // ROUTE BLACKHOLE ISSUE
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