My daughter and I celebrated our birthday together in Dubai this month. My kid is really growing taller and have started to outsmart both me and my wife. We stayed at Atlantis, The Palm where the resort is situated in a man-made island that's in the shape of a palm tree. We've enjoyed swimming at the water theme park (Adventure Cove) and staring at the huge aquariums (The Lost Chambers) where you can see lots of sharks, sting rays and other sea creatures.
I tend to get a bit intimidated whenever I see and work with IPv6 addresses maybe because of its length and different notation (hexadecimal with colon). I started to configure and troubleshoot with actual IPv6 addresses way back in 2012 when I was still working at an ISP company.
We still have plenty of IPv4 public address space in my current company and I'm lucky that I've maximized my IPv4 skills over the years. It's not too long when everyone will completely work with IPv6. Some prediction says that IPv4 will become obsolete by 2040. I could just imagine how we would sound like when doing troubleshooting over the phone with other IT folks.
R1(config)#interface loopback0
R1(config-if)#
*Jan 9 23:28:53.051: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R1(config-if)#ip address 10.1.1.1 255.255.255.0
R1(config-if)#ipv6 address ?
WORD General prefix name
X:X:X:X::X IPv6 link-local address
X:X:X:X::X/<0-128> IPv6 prefix
autoconfig Obtain address using autoconfiguration
dhcp Obtain a ipv6 address using dhcp
R1(config-if)#ipv6 address FEC0::1:1/112 // USE no ipv6 address <address> TO REMOVE IPv6 ADDRESS; ISSUING ipv6 address MULTIPLE TIMES ONLY ADDS MORE ADDRESSES THAN REPLACING THEM
R2(config)#interface loopback0 // IPv4 AND IPv6 RUN INDEPENDENTLY
R2(config-if)#
*Jan 9 22:11:52.647: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R2(config-if)#ip address 10.1.2.1 255.255.255.0
R2(config-if)#ipv6 address FEC0::2:1/112
R3(config)#interface loopback0
R3(config-if)#ip address 10.1
*Jan 9 22:50:02.659: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R3(config-if)#ip address 10.1.3.1 255.255.255.0
R3(config-if)#ipv6 address FEC0::3:1/112
R1(config)#interface s0/0/0
R1(config-if)#ipv6 address FEC0::12:1/112
R1(config-if)#clock rate 64000
R1(config-if)#bandwidth 64
R1(config-if)#no shutdown
R1(config-if)#
*Jan 9 23:34:30.207: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to down
R1(config)#interface s0/0/1
R1(config-if)#ipv6 address FEC0::13:1/112
R1(config-if)#bandwidth 64
R1(config-if)#no shutdown
R1(config-if)#
*Jan 9 23:35:23.967: %LINK-3-UPDOWN: Interface Serial0/0/1, changed state to down
R2(config)#interface s0/0/0
R2(config-if)#ipv6 address FEC0::12:2/112
R2(config-if)#bandwidth 64
R2(config-if)#no shutdown
R2(config-if)#
*Jan 9 22:18:00.451: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to up
*Jan 9 22:18:01.451: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
R2(config-if)#do ping ipv6 FEC0::12:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R3(config)#interface s0/0/0
R3(config-if)#ipv6 address FEC0::13:3/112
R3(config-if)#clockrate 64000
R3(config-if)#bandwidth 64
R3(config-if)#no shutdown
R3(config-if)#
*Jan 9 22:56:41.359: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to up
*Jan 9 22:56:42.359: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
R3(config-if)#do ping ipv6 FEC0::13:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R3(config-if)#
R1#ping FEC0::12:2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
R1#ping FEC0::13:3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R2#ping FEC0::12:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R3#ping FEC0::13:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R1#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::20A:B8FF:FEF8:8392 // LINK-LOCAL ADDRESS; NOT ROUTED
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:1, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF12:1
FF02::1:FFF8:8392
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 37426)
R2#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::21C:58FF:FE89:AE8E
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:2, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF12:2
FF02::1:FF89:AE8E
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 39070)
R1(config)#interface s0/0/0
R1(config-if)#ipv6 address FE80::1 ?
link-local Use link-local address
R1(config-if)#ipv6 address FE80::1 link-local
R2(config)#interface s0/0/0
R2(config-if)#ipv6 address FE80::2 link-local
R1#ping ?
WORD Ping destination address or hostname
appletalk Appletalk echo
clns CLNS echo
decnet DECnet echo
ethernet Ethernet echo
ip IP echo
ipv6 IPv6 echo
ipx Novell/IPX echo
srb srb echo
tag Tag encapsulated IP echo
<cr>
R1#ping FE80::2 // PING REMOTE LINK-LOCAL ADDRESS; MUST SPECIFY OUTGOING INTERFACE
Output Interface: s0/0/0
% Invalid interface. Use full interface name without spaces (e.g. Serial0/1)
Output Interface: Serial0/0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::2, timeout is 2 seconds:
Packet sent with a source address of FE80::1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R2#ping FE80::1
Output Interface: Serial0/0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::1, timeout is 2 seconds:
Packet sent with a source address of FE80::2
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R1#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::1 // MODIFYING LINK-LOCAL ADDRESS IS SELDOM USED
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:1, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF00:1
FF02::1:FF12:1
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 37426)
R2#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::2
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:2, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF00:2
FF02::1:FF12:2
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 39070)
R2(config)#interface f0/0
R2(config-if)#ipv6 address FECO:23::/64 ?
X:X:X:X::X/<0-128> IPv6 prefix
R2(config-if)#ipv6 address FECO:23::/64 ?
X:X:X:X::X/<0-128> IPv6 prefix
R2(config-if)#ipv6 address FECO:23::/64 eui-64
^
% Invalid input detected at '^' marker.
R2(config-if)#no shutdown // NEED TO UNSHUT PORT TO ENABLE eui-64 KEYWORD
*Jan 9 22:31:01.855: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed
R2(config-if)#ipv6 address FEC0:23::/64 ?
anycast Configure as an anycast
cga Use CGA interface identifier
eui-64 Use eui-64 interface identifier
<cr>
R2(config-if)#ipv6 address FEC0:23::/64 eui-64
R3(config)#interface f0/0
R3(config-if)#no shutdown
R3(config-if)#
*Jan 9 23:10:06.903: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Jan 9 23:10:07.903: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R3(config-if)#ipv6 address FEC0:23::/64 eui-64
R2#show ipv6 interface f0/0
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::21C:58FF:FE89:AE8E
No Virtual link-local address(es):
Global unicast address(es):
FEC0:23::21C:58FF:FE89:AE8E, subnet is FEC0:23::/64 [EUI]
Joined group address(es):
FF02::1
FF02::1:FF89:AE8E
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 37623)
R3#show ipv6 interface f0/0
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::21B:D5FF:FE05:9B3A
No Virtual link-local address(es):
Global unicast address(es):
FEC0:23::21B:D5FF:FE05:9B3A, subnet is FEC0:23::/64 [EUI]
Joined group address(es):
FF02::1
FF02::1:FF05:9B3A
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 26231)
R2#show ipv6 interface brief
FastEthernet0/0 [up/up]
FE80::21C:58FF:FE89:AE8E
FEC0:23::21C:58FF:FE89:AE8E
FastEthernet0/1 [administratively down/down]
unassigned
Serial0/0/0 [up/up]
FE80::2
FEC0::12:2
Serial0/0/1 [administratively down/down]
unassigned
Loopback0 [up/up]
FE80::21C:58FF:FE89:AE8E
FEC0::2:1
R3#show ipv6 interface brief
FastEthernet0/0 [up/up]
FE80::21B:D5FF:FE05:9B3A
FEC0:23::21B:D5FF:FE05:9B3A
FastEthernet0/1 [administratively down/down]
unassigned
Serial0/0/0 [up/up]
FE80::21B:D5FF:FE05:9B3A
FEC0::13:3
Serial0/0/1 [down/down]
unassigned
Loopback0 [up/up]
FE80::21B:D5FF:FE05:9B3A
FEC0::3:1
R2#ping FEC0:23::21B:D5FF:FE05:9B3A
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0:23::21B:D5FF:FE05:9B3A, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/2/8 ms
R3#ping FEC0:23::21C:58FF:FE89:AE8E
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0:23::21C:58FF:FE89:AE8E, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms
R1(config)#ipv6 unicast-routing // BOTH ARE DISABLED BY DEFAULT
R1(config)#ipv6 cef
R2(config)#ipv6 unicast-routing
R2(config)#ipv6 cef
R3(config)#ipv6 unicast-routing
R3(config)#ipv6 cef
R1(config)#interface loopback0
R1(config-if)#ipv6 ?
IPv6 interface subcommands:
address Configure IPv6 address on interface
authentication authentication subcommands
bandwidth-percent Set EIGRP bandwidth limit
cef Cisco Express Forwarding for IPv6
cga Configure cga on the interface
dhcp IPv6 DHCP interface subcommands
eigrp Configure EIGRP IPv6 on interface
enable Enable IPv6 on interface
flow Flow related commands
hello-interval Configures IP-EIGRP hello interval
hold-time Configures IP-EIGRP hold time
inspect Apply inspect name
mfib Interface Specific MFIB Control
mld interface commands
mobile Mobile IPv6
mode Interface mode
mtu Set IPv6 Maximum Transmission Unit
multicast multicast
nat Enable IPv6 NAT on interface
nd IPv6 interface Neighbor Discovery subcommands
next-hop-self Configures IP-EIGRP next-hop-self
ospf OSPF interface commands
pim PIM interface commands
policy Enable IPv6 policy routing
redirects Enable sending of ICMP Redirect messages
rip Configure RIP routing protocol
router IPv6 Router interface commands
split-horizon Perform split horizon
summary-address Summary prefix
traffic-filter Access control list for packets
unnumbered Preferred interface for source address selection
unreachables Enable sending of ICMP Unreachable messages
verify Enable per packet validation
virtual-reassembly IPv6 Enable Virtual Fragment Reassembly
R1(config-if)#ipv6 ospf ?
<1-65535> Process ID
authentication Enable authentication
cost Cost
database-filter Filter OSPF LSA during synchronization and flooding
dead-interval Interval after which a neighbor is declared dead
demand-circuit OSPF demand circuit
encryption Enable encryption
flood-reduction OSPF Flood Reduction
hello-interval Time between HELLO packets
mtu-ignore Ignores the MTU in DBD packets
neighbor OSPF neighbor
network Network type
priority Router priority
retransmit-interval Time between retransmitting lost link state
advertisements
transmit-delay Link state transmit delay
R1(config-if)#ipv6 ospf 1 ?
area Set the OSPF area ID
R1(config-if)#ipv6 ospf 1 area ?
<0-4294967295> OSPF area ID as a decimal value
A.B.C.D OSPF area ID in IP address format
R1(config-if)#ipv6 ospf 1 area 0 // IPv6 OSPF USES INTERFACE CONFIG CLI
R1(config-if)#interface s0/0/0
R1(config-if)#ipv6 ospf 1 area 0
R1(config-if)#interface s0/0/1
R1(config-if)#ipv6 ospf 1 area 0
R2(config)#interface loopback0
R2(config-if)#ipv6 ospf 1 area 0
R2(config-if)#interface s0/0/0
R2(config-if)#ipv6 ospf 1 area 0
R2(config-if)#
*Jan 9 22:43:01.623: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/0/0 from LOADING to FULL, Loading Done
R2(config-if)#interface f0/0
R2(config-if)#ipv6 ospf 1 area 0
R3(config)#interface loopback0
R3(config-if)#ipv6 ospf 1 area 0
R3(config-if)#interface s0/0/0
R3(config-if)#ipv6 ospf 1 area 0
R3(config-if)#
*Jan 9 23:21:11.055: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/0/0 from LOADING to FULL, Loading Done
R3(config-if)#interface f0/0
R3(config-if)#ipv6 ospf 1 area 0
*Jan 9 23:21:59.283: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.2.1 on FastEthernet0/0 from LOADING to FULL, Loading Done // TOOK FEW SECONDS TO FORM ADJACENCY
R1#show ipv6 ospf neighbor // OSPFv3 PROCESS WILL NOT START UNLESS AN IPv4 ADDRESS IS CONFIGURED FOR ROUTER ID
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.3.1 1 FULL/ - 00:00:34 5 Serial0/0/1
10.1.2.1 1 FULL/ - 00:00:36 5 Serial0/0/0
R2#show ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.3.1 1 FULL/DR 00:00:31 3 FastEthernet0/0
10.1.1.1 1 FULL/ - 00:00:34 5 Serial0/0/0
R3#show ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.2.1 1 FULL/BDR 00:00:35 3 FastEthernet0/0
10.1.1.1 1 FULL/ - 00:00:35 6 Serial0/0/0
R1#show ipv6 route
IPv6 Routing Table - Default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
EX - EIGRP external
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
C FEC0::1:0/112 [0/0]
via Loopback0, directly connected
L FEC0::1:1/128 [0/0]
via Loopback0, receive
O FEC0::2:1/128 [110/1562]
via FE80::2, Serial0/0/0
O FEC0::3:1/128 [110/1562]
via FE80::21B:D5FF:FE05:9B3A, Serial0/0/1
C FEC0::12:0/112 [0/0]
via Serial0/0/0, directly connected
L FEC0::12:1/128 [0/0]
via Serial0/0/0, receive
C FEC0::13:0/112 [0/0]
via Serial0/0/1, directly connected
L FEC0::13:1/128 [0/0]
via Serial0/0/1, receive
O FEC0:23::/64 [110/1563]
via FE80::2, Serial0/0/0
via FE80::21B:D5FF:FE05:9B3A, Serial0/0/1
L FF00::/8 [0/0]
via Null0, receive
R2#show ipv6 route
IPv6 Routing Table - Default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
EX - EIGRP external
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
O FEC0::1:1/128 [110/1562]
via FE80::1, Serial0/0/0
C FEC0::2:0/112 [0/0]
via Loopback0, directly connected
L FEC0::2:1/128 [0/0]
via Loopback0, receive
O FEC0::3:1/128 [110/1]
via FE80::21B:D5FF:FE05:9B3A, FastEthernet0/0
C FEC0::12:0/112 [0/0]
via Serial0/0/0, directly connected
L FEC0::12:2/128 [0/0]
via Serial0/0/0, receive
O FEC0::13:0/112 [110/1563]
via FE80::21B:D5FF:FE05:9B3A, FastEthernet0/0
C FEC0:23::/64 [0/0]
via FastEthernet0/0, directly connected
L FEC0:23::21C:58FF:FE89:AE8E/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R3#show ipv6 route
IPv6 Routing Table - Default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
EX - EIGRP external
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
O FEC0::1:1/128 [110/1562]
via FE80::20A:B8FF:FEF8:8392, Serial0/0/0
O FEC0::2:1/128 [110/1]
via FE80::21C:58FF:FE89:AE8E, FastEthernet0/0
C FEC0::3:0/112 [0/0]
via Loopback0, directly connected
L FEC0::3:1/128 [0/0]
via Loopback0, receive
O FEC0::12:0/112 [110/1563]
via FE80::21C:58FF:FE89:AE8E, FastEthernet0/0
C FEC0::13:0/112 [0/0]
via Serial0/0/0, directly connected
L FEC0::13:3/128 [0/0]
via Serial0/0/0, receive
C FEC0:23::/64 [0/0]
via FastEthernet0/0, directly connected
L FEC0:23::21B:D5FF:FE05:9B3A/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R1#show ipv6 ospf interface
Loopback0 is up, line protocol is up
Link Local Address FE80::20A:B8FF:FEF8:8392, Interface ID 12
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.1.1
Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
Serial0/0/1 is up, line protocol is up
Link Local Address FE80::20A:B8FF:FEF8:8392, Interface ID 6
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.1.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Index 1/3/3, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 2
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.3.1
Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
Link Local Address FE80::1, Interface ID 5
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.1.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.2.1
Suppress hello for 0 neighbor(s)
R2#show ipv6 ospf interface
Loopback0 is up, line protocol is up
Link Local Address FE80::21C:58FF:FE89:AE8E, Interface ID 12
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.2.1
Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
FastEthernet0/0 is up, line protocol is up
Link Local Address FE80::21C:58FF:FE89:AE8E, Interface ID 3
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.2.1
Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 10.1.3.1, local address FE80::21B:D5FF:FE05:9B3A
Backup Designated router (ID) 10.1.2.1, local address FE80::21C:58FF:FE89:AE8E
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:01
Index 1/3/3, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 2
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.3.1 (Designated Router)
Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
Link Local Address FE80::2, Interface ID 5
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.2.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 6
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.1.1
Suppress hello for 0 neighbor(s)
R3#show ipv6 ospf interface
Loopback0 is up, line protocol is up
Link Local Address FE80::21B:D5FF:FE05:9B3A, Interface ID 12
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.3.1
Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
FastEthernet0/0 is up, line protocol is up
Link Local Address FE80::21B:D5FF:FE05:9B3A, Interface ID 3
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.3.1
Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.3.1, local address FE80::21B:D5FF:FE05:9B3A
Backup Designated router (ID) 10.1.2.1, local address FE80::21C:58FF:FE89:AE8E
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 1/3/3, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.2.1 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
Link Local Address FE80::21B:D5FF:FE05:9B3A, Interface ID 5
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.3.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.1.1
Suppress hello for 0 neighbor(s)
R1#tclsh
R1(tcl)#foreach address {
+>(tcl)#FEC0::1:1
+>(tcl)#FEC0::2:1
+>(tcl)#FEC0::3:1
+>(tcl)#FEC0::12:1
+>(tcl)#FEC0::12:2
+>(tcl)#FEC0::13:1
+>(tcl)#FEC0::13:3
+>(tcl)#FEC0:23::21C:58FF:FE89:AE8E
+>(tcl)#FEC0:23::21B:D5FF:FE05:9B3A
+>(tcl)#} {
+>(tcl)#ping $address }
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::1:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::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 FEC0::3:1, 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 FEC0::12:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:2, 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 FEC0::13:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:3, 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 FEC0:23::21C:58FF:FE89:AE8E, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
Sending 5, 100-byte ICMP Echos to FEC0:23::21B:D5FF:FE05:9B3A, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
I tend to get a bit intimidated whenever I see and work with IPv6 addresses maybe because of its length and different notation (hexadecimal with colon). I started to configure and troubleshoot with actual IPv6 addresses way back in 2012 when I was still working at an ISP company.
We still have plenty of IPv4 public address space in my current company and I'm lucky that I've maximized my IPv4 skills over the years. It's not too long when everyone will completely work with IPv6. Some prediction says that IPv4 will become obsolete by 2040. I could just imagine how we would sound like when doing troubleshooting over the phone with other IT folks.
R1(config)#interface loopback0
R1(config-if)#
*Jan 9 23:28:53.051: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R1(config-if)#ip address 10.1.1.1 255.255.255.0
R1(config-if)#ipv6 address ?
WORD General prefix name
X:X:X:X::X IPv6 link-local address
X:X:X:X::X/<0-128> IPv6 prefix
autoconfig Obtain address using autoconfiguration
dhcp Obtain a ipv6 address using dhcp
R1(config-if)#ipv6 address FEC0::1:1/112 // USE no ipv6 address <address> TO REMOVE IPv6 ADDRESS; ISSUING ipv6 address MULTIPLE TIMES ONLY ADDS MORE ADDRESSES THAN REPLACING THEM
R2(config)#interface loopback0 // IPv4 AND IPv6 RUN INDEPENDENTLY
R2(config-if)#
*Jan 9 22:11:52.647: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R2(config-if)#ip address 10.1.2.1 255.255.255.0
R2(config-if)#ipv6 address FEC0::2:1/112
R3(config)#interface loopback0
R3(config-if)#ip address 10.1
*Jan 9 22:50:02.659: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R3(config-if)#ip address 10.1.3.1 255.255.255.0
R3(config-if)#ipv6 address FEC0::3:1/112
R1(config)#interface s0/0/0
R1(config-if)#ipv6 address FEC0::12:1/112
R1(config-if)#clock rate 64000
R1(config-if)#bandwidth 64
R1(config-if)#no shutdown
R1(config-if)#
*Jan 9 23:34:30.207: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to down
R1(config)#interface s0/0/1
R1(config-if)#ipv6 address FEC0::13:1/112
R1(config-if)#bandwidth 64
R1(config-if)#no shutdown
R1(config-if)#
*Jan 9 23:35:23.967: %LINK-3-UPDOWN: Interface Serial0/0/1, changed state to down
R2(config)#interface s0/0/0
R2(config-if)#ipv6 address FEC0::12:2/112
R2(config-if)#bandwidth 64
R2(config-if)#no shutdown
R2(config-if)#
*Jan 9 22:18:00.451: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to up
*Jan 9 22:18:01.451: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
R2(config-if)#do ping ipv6 FEC0::12:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R3(config)#interface s0/0/0
R3(config-if)#ipv6 address FEC0::13:3/112
R3(config-if)#clockrate 64000
R3(config-if)#bandwidth 64
R3(config-if)#no shutdown
R3(config-if)#
*Jan 9 22:56:41.359: %LINK-3-UPDOWN: Interface Serial0/0/0, changed state to up
*Jan 9 22:56:42.359: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up
R3(config-if)#do ping ipv6 FEC0::13:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R3(config-if)#
R1#ping FEC0::12:2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
R1#ping FEC0::13:3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R2#ping FEC0::12:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R3#ping FEC0::13:1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R1#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::20A:B8FF:FEF8:8392 // LINK-LOCAL ADDRESS; NOT ROUTED
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:1, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF12:1
FF02::1:FFF8:8392
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 37426)
R2#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::21C:58FF:FE89:AE8E
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:2, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF12:2
FF02::1:FF89:AE8E
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 39070)
R1(config)#interface s0/0/0
R1(config-if)#ipv6 address FE80::1 ?
link-local Use link-local address
R1(config-if)#ipv6 address FE80::1 link-local
R2(config)#interface s0/0/0
R2(config-if)#ipv6 address FE80::2 link-local
R1#ping ?
WORD Ping destination address or hostname
appletalk Appletalk echo
clns CLNS echo
decnet DECnet echo
ethernet Ethernet echo
ip IP echo
ipv6 IPv6 echo
ipx Novell/IPX echo
srb srb echo
tag Tag encapsulated IP echo
<cr>
R1#ping FE80::2 // PING REMOTE LINK-LOCAL ADDRESS; MUST SPECIFY OUTGOING INTERFACE
Output Interface: s0/0/0
% Invalid interface. Use full interface name without spaces (e.g. Serial0/1)
Output Interface: Serial0/0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::2, timeout is 2 seconds:
Packet sent with a source address of FE80::1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R2#ping FE80::1
Output Interface: Serial0/0/0
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FE80::1, timeout is 2 seconds:
Packet sent with a source address of FE80::2
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/28 ms
R1#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::1 // MODIFYING LINK-LOCAL ADDRESS IS SELDOM USED
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:1, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF00:1
FF02::1:FF12:1
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 37426)
R2#show ipv6 interface s0/0/0
Serial0/0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::2
No Virtual link-local address(es):
Global unicast address(es):
FEC0::12:2, subnet is FEC0::12:0/112
Joined group address(es):
FF02::1
FF02::1:FF00:2
FF02::1:FF12:2
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 39070)
R2(config)#interface f0/0
R2(config-if)#ipv6 address FECO:23::/64 ?
X:X:X:X::X/<0-128> IPv6 prefix
R2(config-if)#ipv6 address FECO:23::/64 ?
X:X:X:X::X/<0-128> IPv6 prefix
R2(config-if)#ipv6 address FECO:23::/64 eui-64
^
% Invalid input detected at '^' marker.
R2(config-if)#no shutdown // NEED TO UNSHUT PORT TO ENABLE eui-64 KEYWORD
*Jan 9 22:31:01.855: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed
R2(config-if)#ipv6 address FEC0:23::/64 ?
anycast Configure as an anycast
cga Use CGA interface identifier
eui-64 Use eui-64 interface identifier
<cr>
R2(config-if)#ipv6 address FEC0:23::/64 eui-64
R3(config)#interface f0/0
R3(config-if)#no shutdown
R3(config-if)#
*Jan 9 23:10:06.903: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
*Jan 9 23:10:07.903: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
R3(config-if)#ipv6 address FEC0:23::/64 eui-64
R2#show ipv6 interface f0/0
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::21C:58FF:FE89:AE8E
No Virtual link-local address(es):
Global unicast address(es):
FEC0:23::21C:58FF:FE89:AE8E, subnet is FEC0:23::/64 [EUI]
Joined group address(es):
FF02::1
FF02::1:FF89:AE8E
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 37623)
R3#show ipv6 interface f0/0
FastEthernet0/0 is up, line protocol is up
IPv6 is enabled, link-local address is FE80::21B:D5FF:FE05:9B3A
No Virtual link-local address(es):
Global unicast address(es):
FEC0:23::21B:D5FF:FE05:9B3A, subnet is FEC0:23::/64 [EUI]
Joined group address(es):
FF02::1
FF02::1:FF05:9B3A
MTU is 1500 bytes
ICMP error messages limited to one every 100 milliseconds
ICMP redirects are enabled
ICMP unreachables are sent
ND DAD is enabled, number of DAD attempts: 1
ND reachable time is 30000 milliseconds (using 26231)
R2#show ipv6 interface brief
FastEthernet0/0 [up/up]
FE80::21C:58FF:FE89:AE8E
FEC0:23::21C:58FF:FE89:AE8E
FastEthernet0/1 [administratively down/down]
unassigned
Serial0/0/0 [up/up]
FE80::2
FEC0::12:2
Serial0/0/1 [administratively down/down]
unassigned
Loopback0 [up/up]
FE80::21C:58FF:FE89:AE8E
FEC0::2:1
R3#show ipv6 interface brief
FastEthernet0/0 [up/up]
FE80::21B:D5FF:FE05:9B3A
FEC0:23::21B:D5FF:FE05:9B3A
FastEthernet0/1 [administratively down/down]
unassigned
Serial0/0/0 [up/up]
FE80::21B:D5FF:FE05:9B3A
FEC0::13:3
Serial0/0/1 [down/down]
unassigned
Loopback0 [up/up]
FE80::21B:D5FF:FE05:9B3A
FEC0::3:1
R2#ping FEC0:23::21B:D5FF:FE05:9B3A
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0:23::21B:D5FF:FE05:9B3A, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/2/8 ms
R3#ping FEC0:23::21C:58FF:FE89:AE8E
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0:23::21C:58FF:FE89:AE8E, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms
R1(config)#ipv6 unicast-routing // BOTH ARE DISABLED BY DEFAULT
R1(config)#ipv6 cef
R2(config)#ipv6 unicast-routing
R2(config)#ipv6 cef
R3(config)#ipv6 unicast-routing
R3(config)#ipv6 cef
R1(config)#interface loopback0
R1(config-if)#ipv6 ?
IPv6 interface subcommands:
address Configure IPv6 address on interface
authentication authentication subcommands
bandwidth-percent Set EIGRP bandwidth limit
cef Cisco Express Forwarding for IPv6
cga Configure cga on the interface
dhcp IPv6 DHCP interface subcommands
eigrp Configure EIGRP IPv6 on interface
enable Enable IPv6 on interface
flow Flow related commands
hello-interval Configures IP-EIGRP hello interval
hold-time Configures IP-EIGRP hold time
inspect Apply inspect name
mfib Interface Specific MFIB Control
mld interface commands
mobile Mobile IPv6
mode Interface mode
mtu Set IPv6 Maximum Transmission Unit
multicast multicast
nat Enable IPv6 NAT on interface
nd IPv6 interface Neighbor Discovery subcommands
next-hop-self Configures IP-EIGRP next-hop-self
ospf OSPF interface commands
pim PIM interface commands
policy Enable IPv6 policy routing
redirects Enable sending of ICMP Redirect messages
rip Configure RIP routing protocol
router IPv6 Router interface commands
split-horizon Perform split horizon
summary-address Summary prefix
traffic-filter Access control list for packets
unnumbered Preferred interface for source address selection
unreachables Enable sending of ICMP Unreachable messages
verify Enable per packet validation
virtual-reassembly IPv6 Enable Virtual Fragment Reassembly
R1(config-if)#ipv6 ospf ?
<1-65535> Process ID
authentication Enable authentication
cost Cost
database-filter Filter OSPF LSA during synchronization and flooding
dead-interval Interval after which a neighbor is declared dead
demand-circuit OSPF demand circuit
encryption Enable encryption
flood-reduction OSPF Flood Reduction
hello-interval Time between HELLO packets
mtu-ignore Ignores the MTU in DBD packets
neighbor OSPF neighbor
network Network type
priority Router priority
retransmit-interval Time between retransmitting lost link state
advertisements
transmit-delay Link state transmit delay
R1(config-if)#ipv6 ospf 1 ?
area Set the OSPF area ID
R1(config-if)#ipv6 ospf 1 area ?
<0-4294967295> OSPF area ID as a decimal value
A.B.C.D OSPF area ID in IP address format
R1(config-if)#ipv6 ospf 1 area 0 // IPv6 OSPF USES INTERFACE CONFIG CLI
R1(config-if)#interface s0/0/0
R1(config-if)#ipv6 ospf 1 area 0
R1(config-if)#interface s0/0/1
R1(config-if)#ipv6 ospf 1 area 0
R2(config)#interface loopback0
R2(config-if)#ipv6 ospf 1 area 0
R2(config-if)#interface s0/0/0
R2(config-if)#ipv6 ospf 1 area 0
R2(config-if)#
*Jan 9 22:43:01.623: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/0/0 from LOADING to FULL, Loading Done
R2(config-if)#interface f0/0
R2(config-if)#ipv6 ospf 1 area 0
R3(config)#interface loopback0
R3(config-if)#ipv6 ospf 1 area 0
R3(config-if)#interface s0/0/0
R3(config-if)#ipv6 ospf 1 area 0
R3(config-if)#
*Jan 9 23:21:11.055: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.1.1 on Serial0/0/0 from LOADING to FULL, Loading Done
R3(config-if)#interface f0/0
R3(config-if)#ipv6 ospf 1 area 0
*Jan 9 23:21:59.283: %OSPFv3-5-ADJCHG: Process 1, Nbr 10.1.2.1 on FastEthernet0/0 from LOADING to FULL, Loading Done // TOOK FEW SECONDS TO FORM ADJACENCY
R1#show ipv6 ospf neighbor // OSPFv3 PROCESS WILL NOT START UNLESS AN IPv4 ADDRESS IS CONFIGURED FOR ROUTER ID
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.3.1 1 FULL/ - 00:00:34 5 Serial0/0/1
10.1.2.1 1 FULL/ - 00:00:36 5 Serial0/0/0
R2#show ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.3.1 1 FULL/DR 00:00:31 3 FastEthernet0/0
10.1.1.1 1 FULL/ - 00:00:34 5 Serial0/0/0
R3#show ipv6 ospf neighbor
Neighbor ID Pri State Dead Time Interface ID Interface
10.1.2.1 1 FULL/BDR 00:00:35 3 FastEthernet0/0
10.1.1.1 1 FULL/ - 00:00:35 6 Serial0/0/0
R1#show ipv6 route
IPv6 Routing Table - Default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
EX - EIGRP external
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
C FEC0::1:0/112 [0/0]
via Loopback0, directly connected
L FEC0::1:1/128 [0/0]
via Loopback0, receive
O FEC0::2:1/128 [110/1562]
via FE80::2, Serial0/0/0
O FEC0::3:1/128 [110/1562]
via FE80::21B:D5FF:FE05:9B3A, Serial0/0/1
C FEC0::12:0/112 [0/0]
via Serial0/0/0, directly connected
L FEC0::12:1/128 [0/0]
via Serial0/0/0, receive
C FEC0::13:0/112 [0/0]
via Serial0/0/1, directly connected
L FEC0::13:1/128 [0/0]
via Serial0/0/1, receive
O FEC0:23::/64 [110/1563]
via FE80::2, Serial0/0/0
via FE80::21B:D5FF:FE05:9B3A, Serial0/0/1
L FF00::/8 [0/0]
via Null0, receive
R2#show ipv6 route
IPv6 Routing Table - Default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
EX - EIGRP external
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
O FEC0::1:1/128 [110/1562]
via FE80::1, Serial0/0/0
C FEC0::2:0/112 [0/0]
via Loopback0, directly connected
L FEC0::2:1/128 [0/0]
via Loopback0, receive
O FEC0::3:1/128 [110/1]
via FE80::21B:D5FF:FE05:9B3A, FastEthernet0/0
C FEC0::12:0/112 [0/0]
via Serial0/0/0, directly connected
L FEC0::12:2/128 [0/0]
via Serial0/0/0, receive
O FEC0::13:0/112 [110/1563]
via FE80::21B:D5FF:FE05:9B3A, FastEthernet0/0
C FEC0:23::/64 [0/0]
via FastEthernet0/0, directly connected
L FEC0:23::21C:58FF:FE89:AE8E/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R3#show ipv6 route
IPv6 Routing Table - Default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
B - BGP, M - MIPv6, R - RIP, I1 - ISIS L1
I2 - ISIS L2, IA - ISIS interarea, IS - ISIS summary, D - EIGRP
EX - EIGRP external
O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2
ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
O FEC0::1:1/128 [110/1562]
via FE80::20A:B8FF:FEF8:8392, Serial0/0/0
O FEC0::2:1/128 [110/1]
via FE80::21C:58FF:FE89:AE8E, FastEthernet0/0
C FEC0::3:0/112 [0/0]
via Loopback0, directly connected
L FEC0::3:1/128 [0/0]
via Loopback0, receive
O FEC0::12:0/112 [110/1563]
via FE80::21C:58FF:FE89:AE8E, FastEthernet0/0
C FEC0::13:0/112 [0/0]
via Serial0/0/0, directly connected
L FEC0::13:3/128 [0/0]
via Serial0/0/0, receive
C FEC0:23::/64 [0/0]
via FastEthernet0/0, directly connected
L FEC0:23::21B:D5FF:FE05:9B3A/128 [0/0]
via FastEthernet0/0, receive
L FF00::/8 [0/0]
via Null0, receive
R1#show ipv6 ospf interface
Loopback0 is up, line protocol is up
Link Local Address FE80::20A:B8FF:FEF8:8392, Interface ID 12
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.1.1
Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
Serial0/0/1 is up, line protocol is up
Link Local Address FE80::20A:B8FF:FEF8:8392, Interface ID 6
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.1.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Index 1/3/3, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 2
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.3.1
Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
Link Local Address FE80::1, Interface ID 5
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.1.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.2.1
Suppress hello for 0 neighbor(s)
R2#show ipv6 ospf interface
Loopback0 is up, line protocol is up
Link Local Address FE80::21C:58FF:FE89:AE8E, Interface ID 12
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.2.1
Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
FastEthernet0/0 is up, line protocol is up
Link Local Address FE80::21C:58FF:FE89:AE8E, Interface ID 3
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.2.1
Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 10.1.3.1, local address FE80::21B:D5FF:FE05:9B3A
Backup Designated router (ID) 10.1.2.1, local address FE80::21C:58FF:FE89:AE8E
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:01
Index 1/3/3, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 2
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.3.1 (Designated Router)
Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
Link Local Address FE80::2, Interface ID 5
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.2.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:06
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 6
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.1.1
Suppress hello for 0 neighbor(s)
R3#show ipv6 ospf interface
Loopback0 is up, line protocol is up
Link Local Address FE80::21B:D5FF:FE05:9B3A, Interface ID 12
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.3.1
Network Type LOOPBACK, Cost: 1
Loopback interface is treated as a stub Host
FastEthernet0/0 is up, line protocol is up
Link Local Address FE80::21B:D5FF:FE05:9B3A, Interface ID 3
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.3.1
Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 10.1.3.1, local address FE80::21B:D5FF:FE05:9B3A
Backup Designated router (ID) 10.1.2.1, local address FE80::21C:58FF:FE89:AE8E
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 1/3/3, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.2.1 (Backup Designated Router)
Suppress hello for 0 neighbor(s)
Serial0/0/0 is up, line protocol is up
Link Local Address FE80::21B:D5FF:FE05:9B3A, Interface ID 5
Area 0, Process ID 1, Instance ID 0, Router ID 10.1.3.1
Network Type POINT_TO_POINT, Cost: 1562
Transmit Delay is 1 sec, State POINT_TO_POINT,
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:05
Index 1/2/2, flood queue length 0
Next 0x0(0)/0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 4
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 10.1.1.1
Suppress hello for 0 neighbor(s)
R1#tclsh
R1(tcl)#foreach address {
+>(tcl)#FEC0::1:1
+>(tcl)#FEC0::2:1
+>(tcl)#FEC0::3:1
+>(tcl)#FEC0::12:1
+>(tcl)#FEC0::12:2
+>(tcl)#FEC0::13:1
+>(tcl)#FEC0::13:3
+>(tcl)#FEC0:23::21C:58FF:FE89:AE8E
+>(tcl)#FEC0:23::21B:D5FF:FE05:9B3A
+>(tcl)#} {
+>(tcl)#ping $address }
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::1:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::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 FEC0::3:1, 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 FEC0::12:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/0 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::12:2, 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 FEC0::13:1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/0/4 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to FEC0::13:3, 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 FEC0:23::21C:58FF:FE89:AE8E, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
Sending 5, 100-byte ICMP Echos to FEC0:23::21B:D5FF:FE05:9B3A, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 28/28/32 ms
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