1488 CHAPTER 79: MPLS L3VPN CONFIGURATIONn ■ Exchange of BGP routes for a VPN instance is the same as that of ordinary BGProutes.■ The configuration task in BGP instance view is the same as that in BGP view.For detailed information, refer to “BGP Configuration” on page 825.■ For information about BGP peer and peer group configuration, refer to “BGPConfiguration” on page 825. This chapter does not differentiate between peerand peer group.Configuring RouteAdvertisement betweenPEsFollow these steps to configure route advertisement between PEs:Configuring RoutingFeatures for BGP VPNv4Subaddress FamilyWith BGP VPNv4 subaddress family, there are a variety of routing features that arethe same as those for BGP IPv4 unicast routing. You can select any of the featuresas required.Configuring common routing features for all types of subaddress familiesFor VPN applications, BGP address families include BGP VPN-IPv4 address familyand BGP-L2VPN address family. Every command in the following table has thesame function on BGP routes for each type of the address families.Follow these steps to configure common routing features for all types ofsubaddress families:Configure the routeadvertisement behaviorimport-route protocol[ process-id ] [ medmed-value | route-policyroute-policy-name ] *OptionalA CE needs to advertise itsroutes to the connected PE sothat the PE can advertise themto the peer CE.To do... Use the command... RemarksTo do... Use the command... RemarksEnter system view system-view -Enter BGP view bgp as-number RequiredConfigure the remote PE asthe peerpeer { group-name |ip-address } as-numberas-numberRequiredSpecify the source interfacefor route updatespeer { group-name |ip-address }connect-interfaceinterface-typeinterface-numberRequiredBy default, BGP uses thesource interface of theoptimal route update packet.Enter BGP-VPNv4 subaddressfamily viewipv4-family vpnv4[ unicast ]RequiredEnable the exchange ofBGP-VPNv4 routinginformation with the specifiedpeerpeer { group-name |ip-address } enableRequiredBy default, BGP peersexchange IPv4 routinginformation only.To do... Use the command... RemarksEnter system view system-view -Enter BGP view bgp as-number Required
