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Configuration Guide - VPN

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of VPN, including GRE, BGP/MPLS IP VPN, BGP/MPLS IPv6 VPN, VLL, PWE3, and VPLS.
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Configuring MP-EBGP Between ASBRs in Different ASs

Configuring MP-EBGP Between ASBRs in Different ASs


In inter-AS VPN Option B, you do not need to create VPN instances on ASBRs. The ASBR does not filter the VPNv6 routes received from the PE in the same AS based on VPN targets. Instead, it advertises the received VPNv6 routes to the peer ASBR through MP-EBGP.

Perform the following steps on the ASBR.


  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The view of the interface connected with the ASBR interface is displayed.

  3. On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.


    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. Run mpls

    The MPLS is enabled on the interface.

  5. Run ip address ip-address { mask | mask-length }

    An IP address is configured for the interface.

  6. Run bgp { as-number-plain | as-number-dot }

    The BGP view is displayed.

  7. Run peer ipv4-address as-number as-number

    The peer ASBR is specified as the EBGP peer.

  8. (Optional) Run peer { ipv4-address | group-name } ebgp-max-hop [ hop-count ]

    The maximum number of hops is configured for the EBGP connection.

    Generally, one or more directly connected physical links exist between EBGP peers. If no directly connected physical link is available, run this command to ensure that the TCP connection can be set up between the EBGP peers through multiple hops.

  9. Run ipv6-family vpnv6 [ unicast ]

    The BGP-VPNv6 address family is displayed.

  10. Run peer ipv4-address enable

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

  11. Run commit

    The configuration is committed.

Updated: 2019-04-03

Document ID: EDOC1100075353

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