Users Guide

Configure an auto-unnumbered neighbor
To configure an auto-unnumbered neighbor:
1. Configure minimum and maximum RA intervals in CONFIGURATION mode.
ipv6 nd min-ra-interval interval
ipv6 nd max-ra-interval interval
2. Configure physical or port-channel interfaces as Layer 3 interfaces in INTERFACE mode.
interface range ethernet 1/1/1-1/1/4
no shutdown
no switchport
3. Enable RAs on the interfaces in INTERFACE mode.
ipv6 nd send-ra
4. Configure the interfaces as BGP auto-unnumbered interfaces in INTERFACE mode.
ipv6 bgp unnumbered {ebgp-template | ibgp-template}
5. Enable BGP on the device in CONFIGURATION mode.
router bgp as-number
6. Create a template, and assign parameters to the template in ROUTER-BGP mode.
template template-name
timers keepalive holdtime
7. Create a BGP auto unnumbered neighbor in ROUTER-BGP mode.
neighbor unnumbered-auto
no shutdown
8. Configure the peer group template that the neighbors use to inherit peer-group configuration in ROUTER-NEIGHBOR mode.
This template is applied only to the auto-unnumbered interfaces configured with the ipv6 bgp unnumbered command.
inherit {ebgp-template | ibgp-template} template-name
NOTE:
The inherit ebgp-template and inherit ibgp-template commands apply the template
configurations to all auto-unnumbered interfaces that are configured with the ipv6 bgp unnumbered ebgp-
template command.
9. Enable the IPv6 address family to advertise IPv6 routes in ROUTER-NEIGHBOR mode. IPv4 address family is activated by
default.
address-family ipv6 unicast
activate
10. Enable EVPN address family to advertise EVPN routes in ROUTER-NEIGHBOR mode.
address-family l2vpn evpn
activate
Example auto-unnumbered BGP configuration
In the following figure, Router A and Router B share eBGP routes. Router B and Router C share iBGP routes. This section
provides a sample configuration for this topology.
802
Layer 3