Configuring Mbgp; Protocols And Standards; Configuring Mbgp Basic Functions; Prerequisites - HP A6600 Configuration Manual

Configuring MBGP

This document covers configuration tasks related to multiprotocol BGP for IP multicast only. For more
information about BGP, see Layer 3—IP Routing Configuration Guide. For more information about RPF,
see "Configuring multicast routing and
routers and Layer 3 switches.
BGP-4 can carry routing information for IPv4 only. IETF defined multiprotocol BGP extensions to carry
routing information for multiple network layer protocols.
For a network, the multicast topology might be different from the unicast topology. To meet the
requirement, the multiprotocol BGP extensions enable BGP to carry the unicast Network Layer
Reachability Information (NLRI) and multicast NLRI separately, and the multicast NLRI performs RPF
exclusively. In this way, route selection for a destination through the unicast routing table and through the
multicast routing table will have different results, ensuring normal unicast and multicast routing.
Multi-protocol BGP is defined in RFC 2858 (Multiprotocol Extensions for BGP-4).
Multi-protocol BGP for IP multicast is referred to as Multicast BGP (MBGP) for short.

Protocols and standards

• RFC2858, Multiprotocol Extensions for BGP-4
• RFC3392, Capabilities Advertisement with BGP-4
draft-ietf-idmr-bgp-mcast-attr-00, BGP Attributes for Multicast Tree Construction
•
RFC4271, A Border Gateway Protocol 4 (BGP-4)
•
RFC5291, Outbound Route Filtering Capability for BGP-4
•
RFC5292, Address-Prefix-Based Outbound Route Filter for BGP-4
•

Configuring MBGP basic functions

Prerequisites

Before you configure MBGP, make sure neighboring nodes can access each other at the network layer.

Procedure

To do...
1. Enter system view.
2. Enter BGP view.
3. Specify a peer or peer group
and its AS number.
4. Enter IPv4 MBGP address
family view.
forwarding." The term router in this document refers to both
Use the command...
system-view
bgp as-number
peer { group-name | ip-address }
as-number as-number
ipv4-family multicast
194
Remarks
—
—
Required.
Not specified by default.
Required.