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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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Binding a VPN Instance to an Interface

Binding a VPN Instance to an Interface

Prerequisites

A VPN instance has been created and the IPv6 address family has been enabled for the VPN instance.

Context

  • After configuring a VPN instance on a PE, bind the interface that belongs to the VPN to the VPN instance. If the interface belonging to the VPN is not bound to the VPN instance, the interface functions as a public network interface and cannot forward VPN data.
  • An interface becomes a private network interface after being bound to a VPN instance. You must configure an IP address for the interface so that the PE can exchange routing information with its connected CE.
  • After an interface is bound to a VPN instance, configuration of Layer 3 features (IPv4 and IPv6 features) including IP addresses and routing protocols is deleted from the interface.
  • When you disable an address family (IPv4 or IPv6 address family) in a VPN instance, the address family is deleted from the interface. If no address family is configured on the interface, the interface is unbound from the VPN instance.
NOTE:
  • A VPN instance is usually bound to a loopback interface to test whether two private networks can communicate. Before binding a VPN instance to a loopback interface, bind the instance to a VLANIF interface, a physical interface, or a tunnel interface.
  • In actual service applications, a VPN instance must be bound to a VLANIF interface, a physical interface, or a tunnel interface.

Perform the following steps on the PEs:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The view of the interface to be bound to a VPN instance 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.

    NOTE:

    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 ip binding vpn-instance vpn-instance-name

    The interface is bound to the VPN instance.

  5. Run ipv6 enable

    IPv6 is enabled on the interface.

  6. Run ipv6 address { ipv6-address prefix-length | ipv6-address/prefix-length }

    An IPv6 address is configured for the interface.

    Some Layer 3 features such as route exchange between the PE and CE can be configured only after an IPv6 address is configured for the private network interface on the PE.

  7. Run commit

    The configuration is committed.

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Updated: 2019-04-03

Document ID: EDOC1100075353

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