Administrator Guide

CONFIG-ROUTER-BGP mode
address-family ipv6 [unicast | vrf vrf-name]
unicast — Specifies the IPv6 unicast address family. The default address-family is IPv6 unicast.
vrf vrf-name — Specifies the name of VRF instance associated with the IPv6 address-family configuration.
● Enable the neighbor to exchange prefixes for IPv6 unicast address family.
CONFIG-ROUTER-BGP-AF (Address Family) mode
neighbor {ip-address | ipv6–address | peer-group-name} activate
DellEMC(conf)# router bgp 10
DellEMC(conf-router_bgp)# neighbor 2001::1 remote-as 200
DellEMC(conf-router_bgp)# neighbor 2001::1 no shutdown
DellEMC(conf-router_bgp)# address-family ipv6 unicast
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BGP local RIB : Routes to be Added 0, Replaced 0, Withdrawn 0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
Border Gateway Protocol (BGP)
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