Administrator Guide
DellEMC(conf-router_bgpv6_af)#neighbor 2001::1 activate
DellEMC(conf-router_bgpv6_af)#exit
Following is the output of show ip bgp ipv6 unicast summary command for the above configuration example.
DellEMC#show ip bgp ipv6 unicast summary
BGP router identifier 1.1.1.1, local AS number 10
BGP local RIB : Routes to be Added 0, Replaced 0, Withdrawn 0
1 neighbor(s) using 8192 bytes of memory
Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/Pfx
2001::1 200 0 0 0 0 0 00:00:00 0
DellEMC#
Example-Configuring IPv4 and IPv6 neighbors
The following example configurations show how to enable BGP and set up some peer under IPv4 and IPv6 address families.
To support your own IP addresses, interfaces, names, and so on, you can copy and paste from these examples to your CLI. Be sure that
you make the necessary changes.
Example-Configuring IPv4 and IPv6 neighbors
Example of enabling BGP and address family configuration in router (R1)
Following is an example to enable BGP and address family configuration for the neighbor R2 (20.20.20.2) in the router R1.
R1(conf)# router bgp 10
R1(conf-router_bgp)# neighbor 20.20.20.2 remote-as 200
R1(conf-router_bgp)# neighbor 20.20.20.2 no shutdown
R1(conf-router_bgp)# neighbor 2001::2 remote-as 200
R1(conf-router_bgp)# neighbor 2001::2 no shutdown
R1(conf-router_bgp)# neighbor 30.30.30.1 remote-as 20
R1(conf-router_bgp)# neighbor 30.30.30.1 no shutdown
R1(conf-router_bgp)# neighbor 3000::1 remote-as 300
R1(conf-router_bgp)# neighbor 3000::1 no shutdown
R1(conf-router_bgp)# no neighbor 3000::1 activate
R1(conf-router_bgp)# address-family ipv4 multicast
R1(conf-router_bgp_af)# neighbor 20.20.20.2 activate
R1(conf-router_bgp_af)# exit
R1(conf-router_bgp)# address-family ipv6 unicast
R1(conf-router_bgpv6_af)# neighbor 20.20.20.2 activate
R1(conf-router_bgpv6_af)# neighbor 2001::2 activate
R1(conf-router_bgpv6_af)#exit
The neighbors configured under CONFIGURATION-ROUTER-BGP mode and are defined using the neighbor remote-as command
exchange only IPv4 unicast address prefixes. If you want a neighbor to exchange other prefixes such as IPv4 multicast or IPv6 unicast,
you have to explicitly activate the respective neighbor using neighbor activate command in the respective IPv4 multicast or IPv6
unicast address family configuration. In the above example configuration, activating the neighbor (20.20.20.2) under the IPv4 multicast
address family enables the neighbor to exchange IPv4 muticast prefixes. Similarly, activating the neighbors (20.20.20.2 and 2001::2) under
the IPv6 unicast address family enables the neighbor to exchange IPv6 unicast prefixes. The neighbor (30.30.30.1) is activated by default
for exchanging IPv4 unicast address prefixes, but will not exchange IPv4 multicast and IPv6 unicast address prefixes since they are not
activated under the respective address family. If you want the neighbor (30.30.30.1) to exchange IPv4 multicast and/or IPv6 unicast
prefixes, you have to explicitly active the neighbor using neighbor activate command.
If you do not want a neighbor to exchange IPv4 unicast prefixes, you have to manually deactivate the peer with the no neighbor
activate command under the CONFIGURATION-ROUTER-BGP mode. If any neighbor is already activated to exchange IPv4 multicast
or IPv6 unicast prefixes, exchanging of prefixes can be deactivated using
no neighbor activate command under the IPv4 multicast
or IPv6 unicast address family. In the above example configuration, the peer (3000::1) is deactivated from exchanging IPv4 unicast
prefixes.
The show ip bgp summary or show ip bgp ipv4 unicast summary displays IPv4 unicast address family configuration. In a
dual stack scenario, to view the specific IPv4 multicast or IPv6 unicast address family configuration, use
show ip bgp ipv4
multicast summary or show ip bgp ipv6 unicast summary commands.
Following is the sample output for show ip bgp summary command.
R1#show ip bgp summary
BGP router identifier 1.1.1.1, local 10
210
Border Gateway Protocol (BGP)