Dell EMC Configuration Guide for the S4048T–ON System 9.14.2.4

Configuring a BGP peer

To configure a BGP neighbor or peer, you must provide the IP address and the AS number of each neighbor since BGP does not discover the neighbor or peer. Neighbors that are present with the same AS communicate using IBGP while the neighbors that are present in different AS communicate using EBGP. To allow the neighbor to establish a BGP session, you have to enable the neighbor by providing neighbor no shutdown command. To configure BGP between two peers, use the following commands.

• Enter the router configuration mode and the AS number.
  CONFIG mode
  router bgp as-number
• Add the IP address of the neighbor for the specified autonomous system.
  CONFIG-ROUTER-BGP mode
  neighbor {ip-address | ipv6–address | peer-group-name} remote-as as-number
• Enable the neighbor.
  CONFIG-ROUTERBGP mode
  neighbor ip-address | ipv6-address | peer-group-name no shutdown
• Specify the IPv4 address family configuration.
  CONFIG-ROUTER-BGP mode
  address-family ipv4 [multicast | vrf vrf-name]
  multicast — Specifies the IPv4 multicast address family.
  vrf vrf-name — Specifies the name of VRF instance associated with the IPv4 address-family configuration.
• Enable the neighbor to exchange prefixes for IPv4 unicast address family.
  CONFIG-ROUTER-BGP-AF (Address Family) mode
  neighbor {ip-address | ipv6–address | peer-group-name} activate

  NOTE Neighbors have to be activated using neighbor activate command in the respective address family. To exchange other address prefix types (IPv4 multicast or IPv6 unicast), the neighbors must be activated under the respective address family configuration such as address-family ipv4 multicast (for IPv4 multicast) andaddress-family ipv6 unicast(for IPv6).

DellEMC(conf)# router bgp 10
DellEMC(conf-router_bgp)# neighbor 20.20.20.1 remote-as 200
DellEMC(conf-router_bgp)# neighbor 20.20.20.1 no shutdown
DellEMC(conf-router_bgp)# address-family ipv4 multicast
DellEMC(conf-router_bgp_af)# neighbor 20.20.20.1 activate
DellEMC(conf-router_bgp_af)# exit

DellEMC# show ip bgp ipv4 multicast 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BGP local RIB : Routes to be Added 0, Replaced 0, Withdrawn 0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
20.20.20.1      200                 0        0          0    0     0 00:00:00 0
DellEMC#