Jan 12, 2011

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


  • (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


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]

Rob Edwards

Northern (UK) chap focusing on platforms, automation, cloud and cloud native applications. Recovering network engineer, although it turns out networking is as important, if not more, now than before!