Administrator Guide

neighbor 10.10.21.1 no shutdown
neighbor 10.10.32.3 remote-as 65123
neighbor 10.10.32.3 no shutdown
neighbor 100.10.92.9 remote-as 65192
neighbor 100.10.92.9 local-as 6500
neighbor 100.10.92.9 no shutdown
neighbor 192.168.10.1 remote-as 65123
neighbor 192.168.10.1 update-source Loopback 0
neighbor 192.168.10.1 no shutdown
neighbor 192.168.12.2 remote-as 65123
neighbor 192.168.12.2 allowas-in 9
neighbor 192.168.12.2 update-source Loopback 0
neighbor 192.168.12.2 no shutdown
R2(conf-router_bgp)#R2(conf-router_bgp)#
Enabling MBGP Configurations
Multiprotocol BGP (MBGP) is an enhanced BGP that carries IP multicast routes. BGP carries two sets of routes: one set for unicast
routing and one set for multicast routing. The routes associated with multicast routing are used by the protocol independent multicast
(PIM) to build data distribution trees.
Dell EMC Networking OS MBGP is implemented per RFC 1858. You can enable the MBGP feature per router and/or per peer/peer-group.
The default is IPv4 Unicast routes.
When you configure a peer to support IPv4 multicast, Dell EMC Networking OS takes the following actions:
• Send a capability advertisement to the peer in the BGP Open message specifying IPv4 multicast as a supported AFI/SAFI (Subsequent
Address Family Identifier).
• If the corresponding capability is received in the peer’s Open message, BGP marks the peer as supporting the AFI/SAFI.
• When exchanging updates with the peer, BGP sends and receives IPv4 multicast routes if the peer is marked as supporting that AFI/
SAFI.
• Exchange of IPv4 multicast route information occurs through the use of two new attributes called MP_REACH_NLRI and
MP_UNREACH_NLRI, for feasible and withdrawn routes, respectively.
• If the peer has not been activated in any AFI/SAFI, the peer remains in Idle state.
Most Dell EMC Networking OS BGP IPv4 unicast commands are extended to support the IPv4 multicast RIB using extra options to the
command. For a detailed description of the MBGP commands, refer to the Dell EMC Networking OS Command Line Interface Reference
Guide.
MBGP support for IPv6
MBGP suports IPv6 with same features and functionality as IPv4 BGP.
MBGP for IPv6 supports IPv6 address-family and Network Layer Reachability Information (NLRI) and next hop that uses IPv6 address.
Configuring IPv6 MBGP between peers
To configure IPv6 MBGP, use the following commands.
Following are the steps to configure IPv6 MBGP between two peers. The neighbors that are configured using neighbor remote-as
command exchange only the IPv4 unicast address prefixes. In order to exchange IPv6 address prefixes, you have to activate the
neighbors using neighbor activate command inside the address-family configuration.
NOTE:
When configuring a BGP peer under IPv6 address-family, both IPv4 and IPv6 prefixes are sent by default. If you
do not want a peer to exchange IPv4 prefixes, manually deactivate the peer with the no neighbor activate
command under the CONFIGURATION-ROUTER-BGP mode.
• 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
• Specify the IPv6 address family configuration.
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Border Gateway Protocol (BGP)