MPLS BGP

BGP process in MPLS VPN;

• Global BGP routes (Internet routing) are exchanges as in traditional BGP setup
• VPNv4 Prefixes are exchanged through MP-BGP
• VPN routes are exchanged with CE routers through per-VRF External BGP sessions

Configuring;

• (config)# router bgp
• (config-router)# address-family vpn4
• (config-router)# address-familty ipv4 vrf

Configuring MP-iBGP

• router bgp
• neighbor remote-as
• neighbor update-source interface-type interface-number

Syntax;

router(config-router)# address-family vpnv4
router(config-router-af)# neighbor <ip-address> active  #!activate the remote defined peers
router(config-router-af)# neighbor ip-address next-hop-self
router(config-router-af)# neighbor ip-address send-community [standard | extended | both]