Saturday, July 13, 2019

Configuring Multiprotocol BGP (MP-BGP)

MP-BGP allows you to consolidate a variety of protocol types under a single BGP configuration. These protocol types are called address families and include (as just a few examples):

* Unicast IPv4

* Multicast IPv4


* Unicast IPv6


* Multicast IPv6


Note: MP-BGP supports several additional address families, largely used to support virtualization
technologies, such as Virtual Private LAN Service (VPLS) and Layer 2 VPN (L2VPN).

MP-BGP contains several new elements and features not found in BGP-4, including:

* Address Family Identifier (AFI): Specifies the type of address being used by an
Address Family.

* Subsequent Address Family Identifier (SAFI): Provides additional address family
information for some address families.

* Multiprotocol Reachable Network Layer Reachability Information (MP_REACH_
NLRI)
: An attribute that transports a collection of reachable networks, along with
next-hop information.

* Multiprotocol Unreachable Network Layer Reachability Information (MP_
UNREACH_NLRI)
: An attribute that transports a collection of unreachable networks
(used to indicate that specific previously reachable networks are no longer
reachable).

* BGP Capabilities Advertisement: Used by a router to tell a neighboring router its
BGP capabilities—used during BGP session negotiation.

Note that the multiprotocol extensions making up MP-BGP are backward compatible with traditional BGP-4. As a result, a traditional BGP-4 router can form a neighborship with an MP-BGP router, and simply ignore any received BGP messages containing unrecognized extensions.


R1#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#interface loop 0
R1(config-if)#
*Jul 21 07:49:32.203: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R1(config-if)#ip address 10.0.0.1 255.255.255.0
R1(config-if)#ipv6 address 2001:db8:beef:11::1/64
R1(config-if)#
R1(config-if)#interface loop 1
R1(config-if)#
*Jul 21 07:51:03.207: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
R1(config-if)#ip address 10.1.0.1 255.255.0.0
R1(config-if)#ipv6 address 2001:db8:beef:1::1/64
R1(config-if)#
R1(config-if)#interface serial 2/0
R1(config-if)#ip address 192.168.1.1 255.255.255.252
R1(config-if)#ipv6 address 2001:db8:feed:1::1/64
R1(config-if)#no shut
R1(config-if)#
*Jul 21 07:52:34.911: %LINK-3-UPDOWN: Interface Serial2/0, changed state to up
R1(config-if)#
*Jul 21 07:52:35.923: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
R1(config-if)#end
R1#


R2#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#interface loop 0
R2(config-if)#
*Jul 21 07:55:01.503: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R2(config-if)#ip address 172.17.2.1 255.255.255.0
R2(config-if)#ipv6 address 2001:db8:cafe:22::1/64
R2(config-if)#
R2(config-if)#interface loop 1
R2(config-if)#
*Jul 21 07:55:51.731: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
R2(config-if)#ip address 172.16.2.1 255.255.255.0
R2(config-if)#ipv6 address 2001:db8:cafe:2::1/64
R2(config-if)#
R2(config-if)#interface serial 2/0
R2(config-if)#ip address 192.168.1.2 255.255.255.252
R2(config-if)#ipv6 address 2001:db8:feed:1::2/64
R2(config-if)#no shut
R2(config-if)#
*Jul 21 07:57:19.399: %LINK-3-UPDOWN: Interface Serial2/0, changed state to up
R2(config-if)#
*Jul 21 07:57:20.411: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
R2(config-if)#do ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/29/44 ms
R2(config-if)#
R2(config-if)#do ping 2001:db8:feed:1::1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:DB8:FEED:1::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/15/16 ms
R2(config-if)# 
R2(config-if)#interface serial 2/1
R2(config-if)#ip address 172.16.1.1 255.255.255.252
R2(config-if)#ipv6 address 2001:db8:cafe:1::1/64
R2(config-if)#no shut
R2(config-if)#
*Jul 21 07:59:37.451: %LINK-3-UPDOWN: Interface Serial2/1, changed state to up
R2(config-if)#
*Jul 21 07:59:38.463: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/1, changed state to up
R2(config-if)#end
R2#


R3#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
R3(config)#interface loop 0
R3(config-if)#
*Jul 21 08:00:05.927: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback0, changed state to up
R3(config-if)#ip address 172.17.3.1 255.255.255.0
R3(config-if)#ipv6 address 2001:db8:cafe:33::1/64
R3(config-if)#
R3(config-if)#interface loop 1
R3(config-if)#
*Jul 21 08:01:03.951: %LINEPROTO-5-UPDOWN: Line protocol on Interface Loopback1, changed state to up
R3(config-if)#ip address 172.16.3.1 255.255.255.0
R3(config-if)#ipv6 address 2001:db8:cafe:3::1/64
R3(config-if)#
R3(config-if)#interface serial 2/1
R3(config-if)#ip address 172.16.1.2 255.255.255.252
R3(config-if)#ipv6 address 2001:db8:cafe:1::2/64
R3(config-if)#no shut
R3(config-if)#
*Jul 21 08:02:27.059: %LINK-3-UPDOWN: Interface Serial2/1, changed state to up
R3(config-if)#
*Jul 21 08:02:28.071: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/1, changed state to up
R3(config-if)#do ping 172.16.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 8/17/24 ms
R3(config-if)#
R3(config-if)#do ping 2001:db8:cafe:1::1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:DB8:CAFE:1::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/18/20 ms
R3(config-if)#end


R2#conf t     // CONFIGURE EIGRP FOR IPv4 AND IPv6 ON CUSTOMER NETWORK
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#ipv6 unicast-routing
R2(config)#router eigrp 1
R2(config-router)#eigrp router-id 2.2.2.2
R2(config-router)#network 172.16.0.0
R2(config-router)#network 172.17.0.0
R2(config-router)#
R2(config-router)#ipv6 router eigrp 2
R2(config-rtr)#eigrp router-id 2.2.2.2
R2(config-rtr)#
R2(config-rtr)#interface loop 0
R2(config-if)#ipv6 eigrp 2
R2(config-if)#               
R2(config-if)#interface loop 1
R2(config-if)#ipv6 eigrp 2   
R2(config-if)#
R2(config-if)#interface serial 2/1
R2(config-if)#ipv6 eigrp 2       
R2(config-if)#end
R2#
*Jul 21 08:07:36.683: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.2 (Serial2/1) is up: new adjacency
R2#
*Jul 21 08:10:00.775: %DUAL-5-NBRCHANGE: EIGRP-IPv6 2: Neighbor FE80::C803:1CFF:FE48:0 (Serial2/1) is up: new adjacency


R3#conf t     
Enter configuration commands, one per line.  End with CNTL/Z.
R3(config)#ipv6 unicast
R3(config)#router eigrp 1
R3(config-router)#eigrp router-id 3.3.3.3
R3(config-router)#network 172.16.0.0
*Jul 21 08:07:36.631: %DUAL-5-NBRCHANGE: EIGRP-IPv4 1: Neighbor 172.16.1.1 (Serial2/1) is up: new adjacency
R3(config-router)#network 172.17.0.0
R3(config-router)#
R3(config-router)#ipv6 router eigrp 2
R3(config-rtr)#interface loop 0
R3(config-if)#ipv6 eigrp 2
R3(config-if)#
R3(config-if)#interface loop 1
R3(config-if)#ipv6 eigrp 2   
R3(config-if)#
R3(config-if)#interface serial 2/1
R3(config-if)#ipv6 eigrp 2       
R3(config-if)#
*Jul 21 08:10:00.703: %DUAL-5-NBRCHANGE: EIGRP-IPv6 2: Neighbor FE80::C802:23FF:FE24:0 (Serial2/1) is up: new adjacency
R3(config-if)#end
R3#


R1#conf t      // CONFIGURE MP-BGP ON ISP (EBGP WITH R2)
Enter configuration commands, one per line.  End with CNTL/Z.
R1(config)#ipv6 unicast
R1(config)#router bgp 65100
R1(config-router)#bgp router-id 1.1.1.1
R1(config-router)#neighbor 192.168.1.2 remote-as 65000
R1(config-router)#
R1(config-router)#?           
Router configuration commands:
  address-family        Enter Address Family command mode
  aggregate-address     Configure BGP aggregate entries
  auto-summary          Enable automatic network number summarization
  bgp                   BGP specific commands
  default               Set a command to its defaults
  default-information   Control distribution of default information
  default-metric        Set metric of redistributed routes
  distance              Define an administrative distance
  distribute-list       Filter networks in routing updates
  exit                  Exit from routing protocol configuration mode
  help                  Description of the interactive help system
  maximum-paths         Forward packets over multiple paths
  neighbor              Specify a neighbor router
  network               Specify a network to announce via BGP
  no                    Negate a command or set its defaults
  redistribute          Redistribute information from another routing protocol
  route-server-context  Enter route server context command mode
  scope                 Enter scope command mode
  snmp                  Modify snmp parameters
  synchronization       Perform IGP synchronization
  table-map             Map external entry attributes into routing table
  template              Enter template command mode
  timers                Adjust routing timers

R1(config-router)#address-family ?
  ipv4      Address family
  ipv6      Address family
  l2vpn     Address family
  nsap      Address family
  rtfilter  Address family
  vpnv4     Address family
  vpnv6     Address family

R1(config-router)#address-family ipv4 ?
  mdt        Address Family modifier
  multicast  Address Family modifier
  mvpn       Address Family modifier
  unicast    Address Family modifier
  vrf        Specify parameters for a VPN Routing/Forwarding instance
  <cr>

R1(config-router)#address-family ipv4 unicast        // CONFIGURE IPv4 ADDRESS FAMILY (AF)
R1(config-router-af)#?
Router Address Family configuration commands:
  aggregate-address    Configure BGP aggregate entries
  auto-summary         Enable automatic network number summarization
  bgp                  BGP specific commands
  default              Set a command to its defaults
  default-information  Control distribution of default information
  default-metric       Set metric of redistributed routes
  distance             Define an administrative distance
  distribute-list      Filter networks in routing updates
  exit-address-family  Exit from Address Family configuration mode
  help                 Description of the interactive help system
  maximum-paths        Forward packets over multiple paths
  neighbor             Specify a neighbor router
  network              Specify a network to announce via BGP
  no                   Negate a command or set its defaults
  redistribute         Redistribute information from another routing protocol
  snmp                 Modify snmp parameters
  synchronization      Perform IGP synchronization
  table-map            Map external entry attributes into routing table

R1(config-router-af)#network 10.1.0.0 mask 255.255.0.0
R1(config-router-af)#neighbor 192.168.1.2 activate
R1(config-router-af)#exit-address-family
R1(config-router)#address-family ipv6 unicast       // CONFIGURE IPv6 AF
R1(config-router-af)#network 2001:db8:beef:1::/64
R1(config-router-af)#neighbor 192.168.1.2 activate
R1(config-router-af)#neighbor 192.168.1.2 route-map HOPv6 out      // CONFIGURE A ROUTE MAP FOR IPv6 OUTBOUND EBGP UPDATES TO R2
R1(config-router-af)#exit  
R1(config-router)#route-map HOPv6 permit 10
R1(config-route-map)#set ?
  as-path           Prepend string for a BGP AS-path attribute
  automatic-tag     Automatically compute TAG value
  clns              OSI summary address
  comm-list         set BGP community list (for deletion)
  community         BGP community attribute
  dampening         Set BGP route flap dampening parameters
  default           Set default information
  extcomm-list      Set BGP/VPN extended community list (for deletion)
  extcommunity      BGP extended community attribute
  global            Set to global routing table
  interface         Output interface
  ip                IP specific information
  ipv6              IPv6 specific information
  level             Where to import route
  local-preference  BGP local preference path attribute
  metric            Metric value for destination routing protocol
  metric-type       Type of metric for destination routing protocol
  mpls-label        Set MPLS label for prefix
  origin            BGP origin code
  tag               Tag value for destination routing protocol
  traffic-index     BGP traffic classification number for accounting
  vrf               Define VRF name
  weight            BGP weight for routing table

R1(config-route-map)#set ipv6 ?
  address     IPv6 address
  default     Set default information
  next-hop    IPv6 Next hop
  precedence  IPv6 Precedence

R1(config-route-map)#set ipv6 next-hop ?
  X:X:X:X::X    Next hop address
  encapsulate   Encapsulation profile for VPN nexthop
  peer-address  Use peer address (for BGP only)

R1(config-route-map)#set ipv6 next-hop 2001:db8:feed:1::1     // NOTICE IPv6 NEX HOP IS R1 SERIAL 2/0
R1(config-route-map)#end
R1#
*Jul 21 08:19:10.159: %BGP_SESSION-5-ADJCHANGE: neighbor 192.168.1.2 IPv6 Unicast topology base removed from session  Capability changed
*Jul 21 08:19:10.163: %BGP-5-ADJCHANGE: neighbor 192.168.1.2 Up
R1#
*Jul 21 08:22:44.635: %BGP-5-ADJCHANGE: neighbor 192.168.1.2 Down Peer closed the session
*Jul 21 08:22:44.639: %BGP_SESSION-5-ADJCHANGE: neighbor 192.168.1.2 IPv4 Unicast topology base removed from session  Peer closed the session
*Jul 21 08:22:45.447: %BGP-5-ADJCHANGE: neighbor 192.168.1.2 Up
R1#



R2#conf t       // CONFIGURE MP-BGP ON R2 (EBGP WITH R1 AND IBGP WITH R3)
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#router bgp 65000
R2(config-router)#bgp router-id 2.2.2.2
R2(config-router)#neighbor 192.168.1.1 remote-as 65100
R2(config-router)#
*Jul 21 08:19:10.315: %BGP-5-ADJCHANGE: neighbor 192.168.1.1 Up
R2(config-router)#
R2(config-router)#neighbor 172.17.3.1 remote-as 65000       // IPv4 IBGP PEER
R2(config-router)#neighbor 172.17.3.1 update-source loop 0    // USE LOOPBACK 0 AS SOURCE IP FOR BGP UPDATES
R2(config-router)#
R2(config-router)#neighbor 2001:db8:cafe:33::1 remote-as 65000       // IPv6 IBGP PEER
R2(config-router)#neighbor 2001:db8:cafe:33::1 update-source loop 0  
R2(config-router)#address-family ipv4 unicast
R2(config-router-af)#network 172.16.2.0 mask 255.255.255.0
R2(config-router-af)#neighbor 192.168.1.1 activate
R2(config-router-af)#
R2(config-router-af)#neighbor 172.17.3.1 activate
R2(config-router-af)#neighbor 172.17.3.1 next-hop-self    // USE R2 AS NEXT HOP FOR EBGP LEARNED ROUTES
R2(config-router-af)#exit
R2(config-router)#address-family ipv6 unicast         
R2(config-router-af)#network 2001:db8:cafe:2::/64
R2(config-router-af)#neighbor 192.168.1.1 activate
R2(config-router-af)#
*Jul 21 08:22:44.751: %BGP-5-ADJCHANGE: neighbor 192.168.1.1 Down Capability changed
*Jul 21 08:22:44.755: %BGP_SESSION-5-ADJCHANGE: neighbor 192.168.1.1 IPv4 Unicast topology base removed from session  Capability changed
*Jul 21 08:22:45.587: %BGP-5-ADJCHANGE: neighbor 192.168.1.1 Up
R2(config-router-af)#neighbor 192.168.1.1 route-map HOPv6 out     // SIMILAR ROUTE MAP IN R1
R2(config-router-af)#  
R2(config-router-af)#neighbor 2001:db8:cafe:33::1 activate
R2(config-router-af)#neighbor 2001:db8:cafe:33::1 next-hop-self
R2(config-router-af)#exit
R2(config-router)#route-map HOPv6
R2(config-route-map)#set ipv6 next-hop 2001:db8:feed:1::2       // USE R2 IPv6 WAN IP (SERIAL 2/0)
R2(config-route-map)#end
R2#
*Jul 21 08:28:48.047: %BGP-5-ADJCHANGE: neighbor 172.17.3.1 Up
R2#
*Jul 21 08:31:54.431: %BGP-5-ADJCHANGE: neighbor 2001:DB8:CAFE:33::1 Up
R2#



R3#conf t       // CONFIGURE MP-BGP ON R3 (IBGP WITH R2)
Enter configuration commands, one per line.  End with CNTL/Z.
R3(config)#router bgp 65000
R3(config-router)#bgp router-id 3.3.3.3
R3(config-router)#neighbor 2001:db8:cafe:22::1 remote-as 65000
R3(config-router)#neighbor 2001:db8:cafe:22::1 update-source loop 0
R3(config-router)#
R3(config-router)#neighbor 172.17.2.1 remote-as 65000
R3(config-router)#
*Jul 21 08:28:47.971: %BGP-5-ADJCHANGE: neighbor 172.17.2.1 Up
R3(config-router)#                                  
R3(config-router)#neighbor 172.17.2.1 update-source loop 0        
R3(config-router)# 
R3(config-router)#address-family ipv4 unicast
R3(config-router-af)#network 172.16.3.0 mask 255.255.0.0
% BGP: Incorrect network or mask/prefix-length configured
R3(config-router-af)#network 172.16.3.0 mask 255.255.255.0
R3(config-router-af)#neighbor 172.17.2.1 activate
R3(config-router-af)#exit
R3(config-router)#address-family ipv6 unicast
R3(config-router-af)#network 2001:db8:cafe:3::/64
R3(config-router-af)#neighbor 2001:db8:cafe:22::1 activate
R3(config-router-af)#
*Jul 21 08:31:54.359: %BGP-5-ADJCHANGE: neighbor 2001:DB8:CAFE:22::1 Up
R3(config-router-af)#end
R3#


R2#show bgp ?
  *         All scopes
  all       All address families
  ipv4      Address family
  ipv6      Address family
  l2vpn     Address family
  nsap      Address family
  rtfilter  Address family
  vpnv4     Address family
  vpnv6     Address family
  vrf       VRF scope

R2#show bgp all ?
  community          Display routes matching the communities
  community-list     Display routes matching the community-list
  dampening          Display detailed information about dampening
  extcommunity-list  Display routes matching the extcommunity-list
  filter-list        Display routes conforming to the filter-list
  inconsistent-as    Display only routes with inconsistent origin ASs
  neighbors          Detailed information on TCP and BGP neighbor connections
  nexthops           Nexthop address table
  paths              Path information
  peer-group         Display information on peer-groups
  pending-prefixes   Display prefixes pending deletion
  quote-regexp       Display routes matching the AS path "regular expression"
  regexp             Display routes matching the AS path regular expression
  replication        Display replication status of update-group(s)
  rib-failure        Display bgp routes that failed to install in the routing
                     table (RIB)
  summary            Summary of BGP neighbor status
  update-group       Display information on update-groups
  update-sources     Update source interface table
  version            Display prefixes with matching version numbers
  |                  Output modifiers
  <cr>
         
R2#show bgp all neighbors      // VERIFY IPv4 AND IPv4 BGP PEERING
For address family: IPv4 Unicast
BGP neighbor is 172.17.3.1,  remote AS 65000, internal link      // INTERNAL LINK REFERS IBGP
  BGP version 4, remote router ID 3.3.3.3
  BGP state = Established, up for 00:06:16
  Last read 00:00:46, last write 00:00:02, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv4 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                3          2
    Keepalives:             9          8
    Route Refresh:          0          0
    Total:                 13         11
  Default minimum time between advertisement runs is 0 seconds

  Address tracking is enabled, the RIB does have a route to 172.17.3.1
  Connections established 1; dropped 0
  Last reset never
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 255
Local host: 172.17.2.1, Local port: 26767
Foreign host: 172.17.3.1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x2D079C):
Timer          Starts    Wakeups            Next
Retrans            11          0             0x0
TimeWait            0          0             0x0
AckHold            10          7             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger            1          0        0x307090
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 1372476788  snduna: 1372477155  sndnxt: 1372477155
irs: 2428860457  rcvnxt: 2428860745

sndwnd:  16018  scale:      0  maxrcvwnd:  16384
rcvwnd:  16097  scale:      0  delrcvwnd:    287

SRTT: 770 ms, RTTO: 2360 ms, RTV: 1590 ms, KRTT: 0 ms
minRTT: 16 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6
         
Datagrams (max data segment is 1460 bytes):
Rcvd: 21 (out of order: 0), with data: 11, total data bytes: 287
Sent: 22 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 11, total data bytes: 366

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6A359FDC  FREE

BGP neighbor is 192.168.1.1,  remote AS 65100, external link      // EXTERNAL LINK REFERS EBGP
  BGP version 4, remote router ID 1.1.1.1
  BGP state = Established, up for 00:12:18
  Last read 00:00:40, last write 00:00:37, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv4 Unicast: advertised and received
    Address family IPv6 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                9          4
    Keepalives:            13         15
    Route Refresh:          0          0
    Total:                 25         20
  Default minimum time between advertisement runs is 30 seconds

  Address tracking is enabled, the RIB does have a route to 192.168.1.1
  Connections established 2; dropped 1
  Last reset 00:12:19, due to Capability changed of session 1
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 1
Local host: 192.168.1.2, Local port: 20972
Foreign host: 192.168.1.1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x2D07A0):
Timer          Starts    Wakeups            Next
Retrans            20          0             0x0
TimeWait            0          0             0x0
AckHold            17         14             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger           92         91        0x2D0B94
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 3419991927  snduna: 3419992768  sndnxt: 3419992768
irs: 2818091020  rcvnxt: 2818091568

sndwnd:  15544  scale:      0  maxrcvwnd:  16384
rcvwnd:  15837  scale:      0  delrcvwnd:    547

SRTT: 931 ms, RTTO: 1468 ms, RTV: 537 ms, KRTT: 0 ms
minRTT: 8 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1460 bytes):
Rcvd: 37 (out of order: 0), with data: 18, total data bytes: 547
Sent: 39 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 21, total data bytes: 840

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6A359E8C  FREE


For address family: IPv6 Unicast
BGP neighbor is 2001:DB8:CAFE:33::1,  remote AS 65000, internal link
  BGP version 4, remote router ID 3.3.3.3
  BGP state = Established, up for 00:03:10
  Last read 00:00:38, last write 00:00:17, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv6 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                3          2
    Keepalives:             5          5
    Route Refresh:          0          0
    Total:                  9          8
  Default minimum time between advertisement runs is 0 seconds

  Address tracking is enabled, the RIB does have a route to 2001:DB8:CAFE:33::1
  Connections established 1; dropped 0
  Last reset never
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 255
Local host: 2001:DB8:CAFE:22::1, Local port: 59230
Foreign host: 2001:DB8:CAFE:33::1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x2D07A0):
Timer          Starts    Wakeups            Next
Retrans             7          0             0x0
TimeWait            0          0             0x0
AckHold             6          3             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger            1          0        0x334898
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 4247843150  snduna: 4247843492  sndnxt: 4247843492
irs: 3469059070  rcvnxt: 3469059329

sndwnd:  16043  scale:      0  maxrcvwnd:  16384
rcvwnd:  16126  scale:      0  delrcvwnd:    258

SRTT: 607 ms, RTTO: 2949 ms, RTV: 2342 ms, KRTT: 0 ms
minRTT: 8 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1440 bytes):
Rcvd: 13 (out of order: 0), with data: 7, total data bytes: 258
Sent: 14 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 14, total data bytes: 909

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6AAED7A0  FREE
         
BGP neighbor is 192.168.1.1,  remote AS 65100, external link
  BGP version 4, remote router ID 1.1.1.1
  BGP state = Established, up for 00:12:18
  Last read 00:00:40, last write 00:00:37, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv4 Unicast: advertised and received
    Address family IPv6 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                9          4
    Keepalives:            13         15
    Route Refresh:          0          0
    Total:                 25         20
  Default minimum time between advertisement runs is 30 seconds

  Address tracking is enabled, the RIB does have a route to 192.168.1.1
  Connections established 2; dropped 1
  Last reset 00:12:21, due to Capability changed of session 1
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 1
Local host: 192.168.1.2, Local port: 20972
Foreign host: 192.168.1.1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x2D10C8):
Timer          Starts    Wakeups            Next
Retrans            20          0             0x0
TimeWait            0          0             0x0
AckHold            17         14             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger           93         92        0x2D1150
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 3419991927  snduna: 3419992768  sndnxt: 3419992768
irs: 2818091020  rcvnxt: 2818091568

sndwnd:  15544  scale:      0  maxrcvwnd:  16384
rcvwnd:  15837  scale:      0  delrcvwnd:    547

SRTT: 931 ms, RTTO: 1468 ms, RTV: 537 ms, KRTT: 0 ms
minRTT: 8 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1460 bytes):
Rcvd: 37 (out of order: 0), with data: 18, total data bytes: 547
Sent: 39 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 21, total data bytes: 840

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6A359E8C  FREE
         

For address family: IPv4 Multicast



R2#show ip bgp neighbors      // ALTERNATIVE VERIFICATION COMMAND
BGP neighbor is 172.17.3.1,  remote AS 65000, internal link
  BGP version 4, remote router ID 3.3.3.3
  BGP state = Established, up for 00:11:20
  Last read 00:00:19, last write 00:00:45, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv4 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                3          2
    Keepalives:            14         14
    Route Refresh:          0          0
    Total:                 18         17
  Default minimum time between advertisement runs is 0 seconds

 For address family: IPv4 Unicast
  Session: 172.17.3.1
  BGP table version 6, neighbor version 6/0
  Output queue size : 0
  Index 3, Advertise bit 1
  3 update-group member
  NEXT_HOP is always this router for eBGP paths
  Slow-peer detection is disabled
  Slow-peer split-update-group dynamic is disabled
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          1 (Consumes 64 bytes)
    Prefixes Total:                 2          1
    Implicit Withdraw:              0          0
    Explicit Withdraw:              0          0
    Used as bestpath:             n/a          1
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    Bestpath from this peer:              1        n/a
    Total:                                1          0
  Number of NLRIs in the update sent: max 1, min 0
  Last detected as dynamic slow peer: never
  Dynamic slow peer recovered: never
  Refresh Epoch: 1
  Last Sent Refresh Start-of-rib: never
  Last Sent Refresh End-of-rib: never
  Last Received Refresh Start-of-rib: never
  Last Received Refresh End-of-rib: never
                                       Sent       Rcvd
        Refresh activity:              ----       ----
          Refresh Start-of-RIB          0          0
          Refresh End-of-RIB            0          0

  Address tracking is enabled, the RIB does have a route to 172.17.3.1
  Connections established 1; dropped 0
  Last reset never
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 255
Local host: 172.17.2.1, Local port: 26767
Foreign host: 172.17.3.1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x31AF88):
Timer          Starts    Wakeups            Next
Retrans            16          0             0x0
TimeWait            0          0             0x0
AckHold            16         13             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger           47         46        0x31B5AC
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 1372476788  snduna: 1372477250  sndnxt: 1372477250
irs: 2428860457  rcvnxt: 2428860859

sndwnd:  15923  scale:      0  maxrcvwnd:  16384
rcvwnd:  15983  scale:      0  delrcvwnd:    401

SRTT: 882 ms, RTTO: 1768 ms, RTV: 886 ms, KRTT: 0 ms
minRTT: 16 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1460 bytes):
Rcvd: 32 (out of order: 0), with data: 17, total data bytes: 401
Sent: 33 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 16, total data bytes: 461

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6A359FDC  FREE
         
BGP neighbor is 192.168.1.1,  remote AS 65100, external link
  BGP version 4, remote router ID 1.1.1.1
  BGP state = Established, up for 00:17:24
  Last read 00:00:22, last write 00:00:17, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv4 Unicast: advertised and received
    Address family IPv6 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                9          4
    Keepalives:            19         21
    Route Refresh:          0          0
    Total:                 31         26
  Default minimum time between advertisement runs is 30 seconds

 For address family: IPv4 Unicast
  Session: 192.168.1.1
  BGP table version 6, neighbor version 6/0
  Output queue size : 0
  Index 2, Advertise bit 0
  2 update-group member
  Slow-peer detection is disabled
  Slow-peer split-update-group dynamic is disabled
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          1 (Consumes 64 bytes)
    Prefixes Total:                 2          1
    Implicit Withdraw:              0          0
    Explicit Withdraw:              0          0
    Used as bestpath:             n/a          1
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    Bestpath from this peer:              1        n/a
    Invalid Path:                         1        n/a
    Total:                                2          0
  Number of NLRIs in the update sent: max 1, min 0
  Last detected as dynamic slow peer: never
  Dynamic slow peer recovered: never
  Refresh Epoch: 1
  Last Sent Refresh Start-of-rib: never
  Last Sent Refresh End-of-rib: never
  Last Received Refresh Start-of-rib: never
  Last Received Refresh End-of-rib: never
                                       Sent       Rcvd
        Refresh activity:              ----       ----
          Refresh Start-of-RIB          0          0
          Refresh End-of-RIB            0          0

 For address family: IPv6 Unicast
  Session: 192.168.1.1
  BGP table version 4, neighbor version 4/0
  Output queue size : 0
  Index 2, Advertise bit 0
  2 update-group member
  Outbound path policy configured
  Route map for outgoing advertisements is HOPv6
  Slow-peer detection is disabled
  Slow-peer split-update-group dynamic is disabled
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          1 (Consumes 88 bytes)
    Prefixes Total:                 2          1
    Implicit Withdraw:              0          0
    Explicit Withdraw:              2          0
    Used as bestpath:             n/a          1
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    Bestpath from this peer:              1        n/a
    Other Policies:                       2        n/a
    Total:                                3          0
  Number of NLRIs in the update sent: max 1, min 0
  Last detected as dynamic slow peer: never
  Dynamic slow peer recovered: never
  Refresh Epoch: 1
  Last Sent Refresh Start-of-rib: 00:14:09
  Last Sent Refresh End-of-rib: 00:14:09
  Refresh-Out took 0 seconds
  Last Received Refresh Start-of-rib: never
  Last Received Refresh End-of-rib: never
                                       Sent       Rcvd
        Refresh activity:              ----       ----
          Refresh Start-of-RIB          1          0
          Refresh End-of-RIB            1          0

  Address tracking is enabled, the RIB does have a route to 192.168.1.1
  Connections established 2; dropped 1
  Last reset 00:17:25, due to Capability changed of session 1
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 1
Local host: 192.168.1.2, Local port: 20972
Foreign host: 192.168.1.1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x31B41C):
Timer          Starts    Wakeups            Next
Retrans            26          0             0x0
TimeWait            0          0             0x0
AckHold            23         20             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger          323        322        0x31B518
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 3419991927  snduna: 3419992882  sndnxt: 3419992882
irs: 2818091020  rcvnxt: 2818091682

sndwnd:  15430  scale:      0  maxrcvwnd:  16384
rcvwnd:  15723  scale:      0  delrcvwnd:    661

SRTT: 969 ms, RTTO: 1216 ms, RTV: 247 ms, KRTT: 0 ms
minRTT: 8 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1460 bytes):
Rcvd: 49 (out of order: 0), with data: 24, total data bytes: 661
Sent: 51 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 27, total data bytes: 954

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6A359E8C  FREE
         


R2#show bgp ?
  *         All scopes
  all       All address families
  ipv4      Address family
  ipv6      Address family
  l2vpn     Address family
  nsap      Address family
  rtfilter  Address family
  vpnv4     Address family
  vpnv6     Address family
  vrf       VRF scope

R2#show bgp ipv6 ?
  multicast  Address Family modifier
  mvpn       Address Family modifier
  unicast    Address Family modifier

R2#show bgp ipv6 unicast ?
  X:X:X:X::X/<0-128>  IPv6 prefix <network>/<length>
  community           Display routes matching the communities
  community-list      Display routes matching the community-list
  dampening           Display detailed information about dampening
  extcommunity-list   Display routes matching the extcommunity-list
  filter-list         Display routes conforming to the filter-list
  inconsistency       Display all inconsistent paths
  inconsistent-as     Display only routes with inconsistent origin ASs
  injected-paths      Display all injected paths
  labels              Display BGP labels for prefixes
  neighbors           Detailed information on TCP and BGP neighbor connections
  nexthops            Nexthop address table
  paths               Path information
  peer-group          Display information on peer-groups
  pending-prefixes    Display prefixes pending deletion
  prefix-list         Display routes matching the prefix-list
  quote-regexp        Display routes matching the AS path "regular expression"
  regexp              Display routes matching the AS path regular expression
  replication         Display replication status of update-group(s)
  rib-failure         Display bgp routes that failed to install in the routing
                      table (RIB)
  route-map           Display routes matching the route-map
  route-server        Route server information
  rpki                Display RPKI Neighbor Cache
  summary             Summary of BGP neighbor status
  update-group        Display information on update-groups
  update-sources      Update source interface table
  version             Display prefixes with matching version numbers
  |                   Output modifiers
  <cr>

R2#show bgp ipv6 unicast neighbors      // VERIFY IPv6 BGP PEER
BGP neighbor is 2001:DB8:CAFE:33::1,  remote AS 65000, internal link
  BGP version 4, remote router ID 3.3.3.3
  BGP state = Established, up for 00:10:38
  Last read 00:00:53, last write 00:00:16, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv6 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                3          2
    Keepalives:            13         13
    Route Refresh:          0          0
    Total:                 17         16
  Default minimum time between advertisement runs is 0 seconds

 For address family: IPv6 Unicast
  Session: 2001:DB8:CAFE:33::1
  BGP table version 4, neighbor version 4/0
  Output queue size : 0
  Index 3, Advertise bit 1
  3 update-group member
  NEXT_HOP is always this router for eBGP paths
  Slow-peer detection is disabled
  Slow-peer split-update-group dynamic is disabled
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          1 (Consumes 88 bytes)
    Prefixes Total:                 2          1
    Implicit Withdraw:              0          0
    Explicit Withdraw:              0          0
    Used as bestpath:             n/a          1
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    Bestpath from this peer:              1        n/a
    Total:                                1          0
  Number of NLRIs in the update sent: max 1, min 0
  Last detected as dynamic slow peer: never
  Dynamic slow peer recovered: never
  Refresh Epoch: 1
  Last Sent Refresh Start-of-rib: never
  Last Sent Refresh End-of-rib: never
  Last Received Refresh Start-of-rib: never
  Last Received Refresh End-of-rib: never
                                       Sent       Rcvd
        Refresh activity:              ----       ----
          Refresh Start-of-RIB          0          0
          Refresh End-of-RIB            0          0

  Address tracking is enabled, the RIB does have a route to 2001:DB8:CAFE:33::1
  Connections established 1; dropped 0
  Last reset never
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 255
Local host: 2001:DB8:CAFE:22::1, Local port: 59230
Foreign host: 2001:DB8:CAFE:33::1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x33F368):
Timer          Starts    Wakeups            Next
Retrans            15          0             0x0
TimeWait            0          0             0x0
AckHold            14         11             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger           24         23        0x33F57A
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 4247843150  snduna: 4247843644  sndnxt: 4247843644
irs: 3469059070  rcvnxt: 3469059481

sndwnd:  15891  scale:      0  maxrcvwnd:  16384
rcvwnd:  15974  scale:      0  delrcvwnd:    429

SRTT: 865 ms, RTTO: 1866 ms, RTV: 1001 ms, KRTT: 0 ms
minRTT: 8 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1440 bytes):
Rcvd: 30 (out of order: 0), with data: 16, total data bytes: 429
Sent: 31 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 31, total data bytes: 1741

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6AAED7A0  FREE
         
BGP neighbor is 192.168.1.1,  remote AS 65100, external link
  BGP version 4, remote router ID 1.1.1.1
  BGP state = Established, up for 00:19:55
  Last read 00:00:15, last write 00:00:59, hold time is 180, keepalive interval is 60 seconds
  Neighbor sessions:
    1 active, is not multisession capable (disabled)
  Neighbor capabilities:
    Route refresh: advertised and received(new)
    Four-octets ASN Capability: advertised and received
    Address family IPv4 Unicast: advertised and received
    Address family IPv6 Unicast: advertised and received
    Enhanced Refresh Capability: advertised and received
    Multisession Capability:
    Stateful switchover support enabled: NO for session 1
  Message statistics:
    InQ depth is 0
    OutQ depth is 0
   
                         Sent       Rcvd
    Opens:                  1          1
    Notifications:          0          0
    Updates:                9          4
    Keepalives:            22         24
    Route Refresh:          0          0
    Total:                 34         29
  Default minimum time between advertisement runs is 30 seconds

 For address family: IPv4 Unicast
  Session: 192.168.1.1
  BGP table version 6, neighbor version 6/0
  Output queue size : 0
  Index 2, Advertise bit 0
  2 update-group member
  Slow-peer detection is disabled
  Slow-peer split-update-group dynamic is disabled
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          1 (Consumes 64 bytes)
    Prefixes Total:                 2          1
    Implicit Withdraw:              0          0
    Explicit Withdraw:              0          0
    Used as bestpath:             n/a          1
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    Bestpath from this peer:              1        n/a
    Invalid Path:                         1        n/a
    Total:                                2          0
  Number of NLRIs in the update sent: max 1, min 0
  Last detected as dynamic slow peer: never
  Dynamic slow peer recovered: never
  Refresh Epoch: 1
  Last Sent Refresh Start-of-rib: never
  Last Sent Refresh End-of-rib: never
  Last Received Refresh Start-of-rib: never
  Last Received Refresh End-of-rib: never
                                       Sent       Rcvd
        Refresh activity:              ----       ----
          Refresh Start-of-RIB          0          0
          Refresh End-of-RIB            0          0

 For address family: IPv6 Unicast
  Session: 192.168.1.1
  BGP table version 4, neighbor version 4/0
  Output queue size : 0
  Index 2, Advertise bit 0
  2 update-group member
  Outbound path policy configured
  Route map for outgoing advertisements is HOPv6
  Slow-peer detection is disabled
  Slow-peer split-update-group dynamic is disabled
                                 Sent       Rcvd
  Prefix activity:               ----       ----
    Prefixes Current:               2          1 (Consumes 88 bytes)
    Prefixes Total:                 2          1
    Implicit Withdraw:              0          0
    Explicit Withdraw:              2          0
    Used as bestpath:             n/a          1
    Used as multipath:            n/a          0

                                   Outbound    Inbound
  Local Policy Denied Prefixes:    --------    -------
    Bestpath from this peer:              1        n/a
    Other Policies:                       2        n/a
    Total:                                3          0
  Number of NLRIs in the update sent: max 1, min 0
  Last detected as dynamic slow peer: never
  Dynamic slow peer recovered: never
  Refresh Epoch: 1
  Last Sent Refresh Start-of-rib: 00:16:47
  Last Sent Refresh End-of-rib: 00:16:47
  Refresh-Out took 0 seconds
  Last Received Refresh Start-of-rib: never
  Last Received Refresh End-of-rib: never
                                       Sent       Rcvd
        Refresh activity:              ----       ----
          Refresh Start-of-RIB          1          0
          Refresh End-of-RIB            1          0

  Address tracking is enabled, the RIB does have a route to 192.168.1.1
  Connections established 2; dropped 1
  Last reset 00:20:03, due to Capability changed of session 1
  Transport(tcp) path-mtu-discovery is enabled
  Graceful-Restart is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0           
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 1
Local host: 192.168.1.2, Local port: 20972
Foreign host: 192.168.1.1, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50

Enqueued packets for retransmit: 0, input: 0  mis-ordered: 0 (0 bytes)

Event Timers (current time is 0x341DC8):
Timer          Starts    Wakeups            Next
Retrans            29          0             0x0
TimeWait            0          0             0x0
AckHold            26         23             0x0
SendWnd             0          0             0x0
KeepAlive           0          0             0x0
GiveUp              0          0             0x0
PmtuAger          456        455        0x341DDA
DeadWait            0          0             0x0
Linger              0          0             0x0
ProcessQ            0          0             0x0

iss: 3419991927  snduna: 3419992939  sndnxt: 3419992939
irs: 2818091020  rcvnxt: 2818091739

sndwnd:  15373  scale:      0  maxrcvwnd:  16384
rcvwnd:  15666  scale:      0  delrcvwnd:    718

SRTT: 979 ms, RTTO: 1146 ms, RTV: 167 ms, KRTT: 0 ms
minRTT: 8 ms, maxRTT: 1000 ms, ACK hold: 200 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6

Datagrams (max data segment is 1460 bytes):
Rcvd: 55 (out of order: 0), with data: 27, total data bytes: 718
Sent: 57 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 30, total data bytes: 1011

 Packets received in fast path: 0, fast processed: 0, slow path: 0
 fast lock acquisition failures: 0, slow path: 0
TCP Semaphore      0x6A359E8C  FREE
         


R1#show bgp ipv4 ?
  mdt        Address Family modifier
  multicast  Address Family modifier
  mvpn       Address Family modifier
  unicast    Address Family modifier

R1#show bgp ipv4 unicast ?
  A.B.C.D            Network in the BGP routing table to display
  A.B.C.D/nn         IP prefix <network>/<length>, e.g., 35.0.0.0/8
  cidr-only          Display only routes with non-natural netmasks
  community          Display routes matching the communities
  community-list     Display routes matching the community-list
  dampening          Display detailed information about dampening
  extcommunity-list  Display routes matching the extcommunity-list
  filter-list        Display routes conforming to the filter-list
  import             Display route topology import / export activity
  inconsistency      Display all inconsistent paths
  inconsistent-as    Display only routes with inconsistent origin ASs
  injected-paths     Display all injected paths
  labels             Display Labels for IPv4 NLRI specific information
  neighbors          Detailed information on TCP and BGP neighbor connections
  nexthops           Nexthop address table
  oer-paths          Display all oer controlled paths
  paths              Path information
  peer-group         Display information on peer-groups
  pending-prefixes   Display prefixes pending deletion
  prefix-list        Display routes matching the prefix-list
  quote-regexp       Display routes matching the AS path "regular expression"
  regexp             Display routes matching the AS path regular expression
  replication        Display replication status of update-group(s)
  rib-failure        Display bgp routes that failed to install in the routing
                     table (RIB)
  route-map          Display routes matching the route-map
  route-server       Route server information
  rpki               Display RPKI Neighbor Cache
  summary            Summary of BGP neighbor status
  template           Display peer-policy/peer-session templates
  topology           Routing topology instance
  update-group       Display information on update-groups
  update-sources     Update source interface table
  va                 Display virtual aggregation prefixes
  version            Display prefixes with matching version numbers
  |                  Output modifiers
  <cr>

R1#show bgp ipv4 unicast summary      // VERIFY IPv4 BGP PEER
BGP router identifier 1.1.1.1, local AS number 65100
BGP table version is 6, main routing table version 6
3 network entries using 444 bytes of memory
3 path entries using 192 bytes of memory
3/3 BGP path/bestpath attribute entries using 408 bytes of memory
1 BGP AS-PATH entries using 24 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 1068 total bytes of memory
BGP activity 7/1 prefixes, 8/2 paths, scan interval 60 secs

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
192.168.1.2     4        65000      37      32        6    0    0 00:22:43        2
R1#
R1#show bgp ipv6 unicast summary
BGP router identifier 1.1.1.1, local AS number 65100
BGP table version is 4, main routing table version 4
3 network entries using 516 bytes of memory
3 path entries using 264 bytes of memory
3/3 BGP path/bestpath attribute entries using 408 bytes of memory
1 BGP AS-PATH entries using 24 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 1212 total bytes of memory
BGP activity 7/1 prefixes, 8/2 paths, scan interval 60 secs

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
192.168.1.2     4        65000      37      32        4    0    0 00:22:47       // NOTICE IPv4 IS USED FOR EBGP TRANSPORT


R2#show bgp ipv4 unicast summary
BGP router identifier 2.2.2.2, local AS number 65000
BGP table version is 6, main routing table version 6
3 network entries using 444 bytes of memory
3 path entries using 192 bytes of memory
3/3 BGP path/bestpath attribute entries using 408 bytes of memory
1 BGP AS-PATH entries using 24 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 1068 total bytes of memory
BGP activity 6/0 prefixes, 7/1 paths, scan interval 60 secs

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
172.17.3.1      4        65000      24      26        6    0    0 00:18:03        1
192.168.1.1     4        65100      34      38        6    0    0 00:24:06        1
R2#
R2#show bgp ipv6 unicast summary
BGP router identifier 2.2.2.2, local AS number 65000
BGP table version is 4, main routing table version 4
3 network entries using 516 bytes of memory
3 path entries using 264 bytes of memory
3/3 BGP path/bestpath attribute entries using 408 bytes of memory
1 BGP AS-PATH entries using 24 bytes of memory
0 BGP route-map cache entries using 0 bytes of memory
0 BGP filter-list cache entries using 0 bytes of memory
BGP using 1212 total bytes of memory
BGP activity 6/0 prefixes, 7/1 paths, scan interval 60 secs

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
2001:DB8:CAFE:33::1
                4        65000      22      22        4    0    0 00:15:03        1
192.168.1.1     4        65100      34      38        4    0    0 00:24:12



R1#show bgp ipv4 unicast      // VIEW IPv4 BGP TABLE
BGP table version is 6, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  10.1.0.0/16      0.0.0.0                  0         32768 i
 *>  172.16.2.0/24    192.168.1.2              0             0 65000 i
 *>  172.16.3.0/24    192.168.1.2                            0 65000 i
R1#
R1#show ip bgp     // SIMILAR COMMAND TO show bgp ipv4 unicast
BGP table version is 6, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  10.1.0.0/16      0.0.0.0                  0         32768 i
 *>  172.16.2.0/24    192.168.1.2              0             0 65000 i
 *>  172.16.3.0/24    192.168.1.2                            0 65000 i


R1#show bgp ipv6 unicast     // VIEW IPv6 BGP TABLE
BGP table version is 4, local router ID is 1.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  2001:DB8:BEEF:1::/64
                       ::                       0         32768 i
 *>  2001:DB8:CAFE:2::/64
                       2001:DB8:FEED:1::2      // NOTICE USING R2 EBGP NEXT HOP
                                                0             0 65000 i
 *>  2001:DB8:CAFE:3::/64
                       2001:DB8:FEED:1::2
                                                              0 65000 i



R2#show bgp ipv4 unicast
BGP table version is 6, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  10.1.0.0/16      192.168.1.1              0             0 65100 i
 *>  172.16.2.0/24    0.0.0.0                  0         32768 i
 r>i 172.16.3.0/24    172.17.3.1               0    100      0 i      // NOTICE r SINCE 172.16.3.0/24 IS LEARNED AND INSTALLING IN THE ROUTING TABLE VIA EIGRP (LOWER AD 90 vs AD 200)


R2#show ip bgp r?
regexp        replication  rib-failure  route-map
route-server  rpki         rtfilter    

R2#show ip bgp rib-failure
  Network            Next Hop                      RIB-failure   RIB-NH Matches
172.16.3.0/24      172.17.3.1          Higher admin distance              n/a


R2#show bgp ipv6 unicast
BGP table version is 4, local router ID is 2.2.2.2
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>  2001:DB8:BEEF:1::/64
                       2001:DB8:FEED:1::1       // NOTICE USING R2 EBGP NEXT HOP
                                                0             0 65100 i
 *>  2001:DB8:CAFE:2::/64
                       ::                       0         32768 i
 r>i 2001:DB8:CAFE:3::/64
                       2001:DB8:CAFE:33::1
                                                0    100      0 i



R3#show bgp ipv4 unicast
BGP table version is 4, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>i 10.1.0.0/16      172.17.2.1               0    100      0 65100 i        // R2 NEXT HOP DUE TO next-hop-self
 r>i 172.16.2.0/24    172.17.2.1               0    100      0 i
 *>  172.16.3.0/24    0.0.0.0                  0         32768 i
R3#
R3#show bgp ipv6 unicast
BGP table version is 4, local router ID is 3.3.3.3
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
              x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path
 *>i 2001:DB8:BEEF:1::/64
                       2001:DB8:CAFE:22::1
                                                0    100      0 65100 i
 r>i 2001:DB8:CAFE:2::/64
                       2001:DB8:CAFE:22::1
                                                0    100      0 i
 *>  2001:DB8:CAFE:3::/64
                       ::                       0         32768 i



R1#show ip route
Codes: L - local, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/8 is variably subnetted, 4 subnets, 3 masks
C        10.0.0.0/24 is directly connected, Loopback0
L        10.0.0.1/32 is directly connected, Loopback0
C        10.1.0.0/16 is directly connected, Loopback1
L        10.1.0.1/32 is directly connected, Loopback1
      172.16.0.0/24 is subnetted, 2 subnets
B        172.16.2.0 [20/0] via 192.168.1.2, 00:31:23       // EBGP AD 20
B        172.16.3.0 [20/0] via 192.168.1.2, 00:23:18
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/30 is directly connected, Serial2/0
L        192.168.1.1/32 is directly connected, Serial2/0
R1#
R1#show ipv6 route
IPv6 Routing Table - default - 9 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       IS - ISIS summary, D - EIGRP, EX - EIGRP external, ND - ND Default
       NDp - ND Prefix, DCE - Destination, NDr - Redirect, O - OSPF Intra
       OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1
       ON2 - OSPF NSSA ext 2, l - LISP
C   2001:DB8:BEEF:1::/64 [0/0]
     via Loopback1, directly connected
L   2001:DB8:BEEF:1::1/128 [0/0]
     via Loopback1, receive
C   2001:DB8:BEEF:11::/64 [0/0]
     via Loopback0, directly connected
L   2001:DB8:BEEF:11::1/128 [0/0]
     via Loopback0, receive
B   2001:DB8:CAFE:2::/64 [20/0]            // EBGP AD 20
     via FE80::C802:23FF:FE24:0, Serial2/0
B   2001:DB8:CAFE:3::/64 [20/0]
     via FE80::C802:23FF:FE24:0, Serial2/0
C   2001:DB8:FEED:1::/64 [0/0]
     via Serial2/0, directly connected
L   2001:DB8:FEED:1::1/128 [0/0]
     via Serial2/0, receive
L   FF00::/8 [0/0]
     via Null0, receive


R2#show ip route
Codes: L - local, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/16 is subnetted, 1 subnets
B        10.1.0.0 [20/0] via 192.168.1.1, 00:32:57
      172.16.0.0/16 is variably subnetted, 5 subnets, 3 masks
C        172.16.1.0/30 is directly connected, Serial2/1
L        172.16.1.1/32 is directly connected, Serial2/1
C        172.16.2.0/24 is directly connected, Loopback1
L        172.16.2.1/32 is directly connected, Loopback1
D        172.16.3.0/24 [90/2297856] via 172.16.1.2, 00:48:06, Serial2/1      // EIGRP (INTERNAL AD 90) LEARNED ROUTES FROM R3
      172.17.0.0/16 is variably subnetted, 3 subnets, 2 masks
C        172.17.2.0/24 is directly connected, Loopback0
L        172.17.2.1/32 is directly connected, Loopback0
D        172.17.3.0/24 [90/2297856] via 172.16.1.2, 00:48:02, Serial2/1
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/30 is directly connected, Serial2/0
L        192.168.1.2/32 is directly connected, Serial2/0
R2#
R2#show ipv6 route
IPv6 Routing Table - default - 12 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       IS - ISIS summary, D - EIGRP, EX - EIGRP external, ND - ND Default
       NDp - ND Prefix, DCE - Destination, NDr - Redirect, O - OSPF Intra
       OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1
       ON2 - OSPF NSSA ext 2, l - LISP
B   2001:DB8:BEEF:1::/64 [20/0]
     via FE80::C801:27FF:FE70:0, Serial2/0
C   2001:DB8:CAFE:1::/64 [0/0]
     via Serial2/1, directly connected
L   2001:DB8:CAFE:1::1/128 [0/0]
     via Serial2/1, receive
C   2001:DB8:CAFE:2::/64 [0/0]
     via Loopback1, directly connected
L   2001:DB8:CAFE:2::1/128 [0/0]
     via Loopback1, receive
D   2001:DB8:CAFE:3::/64 [90/2297856]
     via FE80::C803:1CFF:FE48:0, Serial2/1
C   2001:DB8:CAFE:22::/64 [0/0]
     via Loopback0, directly connected
L   2001:DB8:CAFE:22::1/128 [0/0]
     via Loopback0, receive
D   2001:DB8:CAFE:33::/64 [90/2297856]
     via FE80::C803:1CFF:FE48:0, Serial2/1
C   2001:DB8:FEED:1::/64 [0/0]
     via Serial2/0, directly connected
L   2001:DB8:FEED:1::2/128 [0/0]
     via Serial2/0, receive
L   FF00::/8 [0/0]
     via Null0, receive


R3#show ip route
Codes: L - local, 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, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is not set

      10.0.0.0/16 is subnetted, 1 subnets
B        10.1.0.0 [200/0] via 172.17.2.1, 00:28:14      // IBGP (AD 200) LEARNED ROUTE FROM R2
      172.16.0.0/16 is variably subnetted, 5 subnets, 3 masks
C        172.16.1.0/30 is directly connected, Serial2/1
L        172.16.1.2/32 is directly connected, Serial2/1
D        172.16.2.0/24 [90/2297856] via 172.16.1.1, 00:49:25, Serial2/1        // EIGRP (AD 90) LEARNED ROUTE FROM R2
C        172.16.3.0/24 is directly connected, Loopback1
L        172.16.3.1/32 is directly connected, Loopback1
      172.17.0.0/16 is variably subnetted, 3 subnets, 2 masks
D        172.17.2.0/24 [90/2297856] via 172.16.1.1, 00:49:25, Serial2/1
C        172.17.3.0/24 is directly connected, Loopback0
L        172.17.3.1/32 is directly connected, Loopback0
R3#
R3#show ipv6 route
IPv6 Routing Table - default - 10 entries
Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
       B - BGP, HA - Home Agent, MR - Mobile Router, R - RIP
       H - NHRP, I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea
       IS - ISIS summary, D - EIGRP, EX - EIGRP external, ND - ND Default
       NDp - ND Prefix, DCE - Destination, NDr - Redirect, O - OSPF Intra
       OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2, ON1 - OSPF NSSA ext 1
       ON2 - OSPF NSSA ext 2, l - LISP
B   2001:DB8:BEEF:1::/64 [200/0]         // IBGP (AD 200) LEARNED ROUTE FROM R2
     via 2001:DB8:CAFE:22::1
C   2001:DB8:CAFE:1::/64 [0/0]
     via Serial2/1, directly connected
L   2001:DB8:CAFE:1::2/128 [0/0]
     via Serial2/1, receive
D   2001:DB8:CAFE:2::/64 [90/2297856]     // EIGRP (AD 90) LEARNED ROUTE
     via FE80::C802:23FF:FE24:0, Serial2/1
C   2001:DB8:CAFE:3::/64 [0/0]
     via Loopback1, directly connected
L   2001:DB8:CAFE:3::1/128 [0/0]
     via Loopback1, receive
D   2001:DB8:CAFE:22::/64 [90/2297856]
     via FE80::C802:23FF:FE24:0, Serial2/1
C   2001:DB8:CAFE:33::/64 [0/0]
     via Loopback0, directly connected
L   2001:DB8:CAFE:33::1/128 [0/0]
     via Loopback0, receive
L   FF00::/8 [0/0]
     via Null0, receive

R3#ping 10.1.0.1 source 172.16.3.1        // VERIFY IPv4 CONNECTIIVTY TO R1 (ISP)
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.0.1, timeout is 2 seconds:
Packet sent with a source address of 172.16.3.1
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/35/64 ms
R3#
R3#ping 2001:db8:beef:1::1 source loop 1      // VERIFY IPv6 CONNECTIIVTY TO R1 (ISP)
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001:DB8:BEEF:1::1, timeout is 2 seconds:
Packet sent with a source address of 2001:DB8:CAFE:3::1
!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 36/40/48 ms

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