Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

Establishing Sessions with BGP Neighbors for Nondefault VRF

To establish sessions with either IPv6 or IPv4 BGP neighbors for nondefault VRFs, follow these steps:

1. Enable BFD globally.
   CONFIGURATION mode
   bfd enable
2. Specify the AS number and enter ROUTER BGP configuration mode.
   CONFIGURATION mode
   router bgp as-number
3. Specify the address family as IPv4.
   CONFIG-ROUTERBGP mode
   address-family ipv4 vrf vrf-name
4. Add an IPv4 BGP neighbor or peer group in a remote AS.
   CONFIG-ROUTERBGP_ADDRESSFAMILY mode
   neighbor {ip-address | peer-group name} remote-as as-number
5. Enable the BGP neighbor.
   CONFIG-ROUTERBGP_ADDRESSFAMILY mode
   neighbor {ip-address | peer-group-name} no shutdown
6. Add an IPv6 BGP neighbor or peer group in a remote AS.
   CONFIG-ROUTERBGP_ADDRESSFAMILY mode
   neighbor {ipv6-address | peer-group name} remote-as as-number
7. Enable the BGP neighbor.
   CONFIG-ROUTERBGP_ADDRESSFAMILY mode
   neighbor { ipv6-address | peer-group-name} no shutdown
8. Specify the address family as IPv6.
   CONFIG-ROUTERBGP_ADDRESSFAMILY mode
   address-family ipv6 unicast vrf vrf-name
   NOTE Before performing this step, create the required VRF.
9. Activate the neighbor in IPv6 address family.
   CONFIG-ROUTERBGPv6_ADDRESSFAMILY mode
   neighbor ipv6-address activate
10. Configure parameters for a BFD session established with all neighbors discovered by BGP. Or establish a BFD session with a specified BGP neighbor or peer group using the default BFD session parameters.
    CONFIG-ROUTERBGP mode
    bfd all-neighbors

DellEMC(conf)#router bgp 1
DellEMC(conf-router_bgp)#address-family ipv4 vrf vrf1
DellEMC(conf-router_bgp_af)#neighbor 10.1.1.2 remote-as 2
DellEMC(conf-router_bgp_af)#neighbor 10.1.1.2 no shutdown
DellEMC(conf-router_bgp_af)#neighbor 20::2 remote-as 2
DellEMC(conf-router_bgp_af)#neighbor 20::2 no shutdown
DellEMC(conf-router_bgp_af)#address-family ipv6 unicast vrf vrf1
DellEMC(conf-router_bgpv6_af)#neighbor 20::2 activate
DellEMC(conf-router_bgpv6_af)#address-family ipv4 vrf vrf1
DellEMC(conf-router_bgp_af)#bfd all-neighbors
DellEMC(conf-router_bgp_af)#exit
DellEMC(conf-router_bgp)#show config
!
router bgp 1
 !
 address-family ipv4 vrf vrf1
  neighbor 10.1.1.2 remote-as 2
  neighbor 10.1.1.2 no shutdown
  neighbor 20::2 remote-as 2
  neighbor 20::2 no shutdown
  bfd all-neighbors
  exit-address-family
 !
 address-family ipv6 unicast vrf vrf1
  neighbor 20::2 activate
  exit-address-family
DellEMC(conf-router_bgp)#