258IMPORTANT:• To configure an MBGP peer group, you must enable the corresponding IPv4 BGP unicast peer group inIPv4 MBGP address family view.• Before adding an MBGP peer to an MBGP peer group, you must add the corresponding IPv4 unicastpeer to the IPv4 BGP peer group.To configure an IPv4 MBGP peer group:Step Command Remarks1. Enter system view. system-view N/A2. Enter BGP view. bgp as-number N/A3. Create a BGP peer group. group group-name [ external |internal ] Not created by default.4. Add a peer into the peergroup.peer ip-address group group-name[ as-number as-number ] No peer is added by default.5. Enter IPv4 MBGP addressfamily view. ipv4-family multicast N/A6. Enable the IPv4 unicast peergroup. peer group-name enable N/A7. Add an IPv4 MBGP peer tothe peer group. peer ip-address group group-name Not configured by default.Configuring MBGP communityThe COMMUNITY attribute can be advertised between MBGP peers in different ASs. Routers in the samecommunity share the same policy.You can reference a routing policy to modify the COMMUNITY attribute for routes sent to a peer. Inaddition, you can define extended community attributes as needed.When you configure MBGP community, you must reference a routing policy to define the specificCOMMUNITY attributes, and apply the routing policy for route advertisement. For routing policyconfiguration, see Layer 3—IP Routing Configuration Guide.To configure MBGP community:Step Command Remarks1. Enter system view. system-view N/A2. Enter BGP view. bgp as-number N/A3. Enter IPv4 MBGP addressfamily view. ipv4-family multicast N/A
