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Configuration Guide - VPN

S1720, S2700, S5700, and S6720 V200R010C00

This document describes the VPN configuration procedures and provides configuration examples.
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Establishing MP-IBGP Peer Relationships Between PEs

Establishing MP-IBGP Peer Relationships Between PEs

Context

If VPN sites in a basic BGP/MPLS IPv6 VPN need to communicate, PEs must use MP-IBGP to advertise VPNv6 routes with the route distinguisher (RD) information to each other. Since all the PEs reside in the same AS, MP-IBGP peer relationships can be set up between them. In the current implementation, IPv4 BGP peer relationships are set up between PEs.

Perform the following steps on the PEs:

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    bgp { as-number-plain | as-number-dot }

    The BGP view is displayed.

  3. Run:

    peer ipv4-address as-number as-number

    The peer PE is configured as a BGP peer.

  4. Run:

    peer ipv4-address connect-interface loopback interface-number

    An interface is used to set up a TCP connection with the BGP peer.

    NOTE:

    A PE must use a loopback interface address with a 32-bit mask to set up an MP-IBGP peer relationship with the peer PE so that VPN routes can be iterated to tunnels. The route to the local loopback interface is advertised to the peer PE using an IGP on the MPLS backbone network.

  5. Run:

    ipv6-family vpnv6

    The BGP VPNv6 address family view is displayed.

  6. Run:

    peer ipv4-address enable

    The ability to exchange VPN IPv6 routes with the BGP peer is enabled.

Related Tasks

When a large number of PEs on the backbone network need to establish MP-IBGP peer relationships to exchange VPN routes, configure a route reflector (RR) to reduce the number of MP-IBGP connections between PEs. The PEs only need to establish MP-IBGP peer relationships with the RR. For detailed configuration, see Configuring Route Reflection for BGP VPNv6 Routes.

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Updated: 2019-08-21

Document ID: EDOC1000141944

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