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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 Inter-AS VPN Option A

Configuring Inter-AS VPN Option A


If the MPLS VPN backbone network spans multiple ASs, inter-AS VPN is required. Inter-AS VPN Option A can be used if each PE device has only a few VPNs and VPN routes.

To implement inter-AS VPN Option A, complete basic BGP/MPLS IP VPN functions in each AS and configure the ASBR-PE devices as the CE device of each other. Then, configure a VPN instance for a PE device and another VPN instance for an ASBR-PE device. The PE device connects to CE devices, and the ASBR-PE device connects to the remote ASBR-PE device. For details about basic BGP/MPLS IP VPN configuration, see Configuring Basic BGP/MPLS IP VPN Functions.

In inter-AS VPN Option A, the VPN targets of VPN instances on the ASBR and PE devices in the same AS must match for the same VPN. This is not required for the PE devices in different ASs.

Verifying the Configuration

After inter-AS VPN Option A is configured, run the following commands to check previous configurations.

  • Run the display bgp vpnv4 all peer command on the PE or ASBR device to check whether the status of the BGP VPNv4 peer relationship between the PE and ASBR devices in the same AS is Established.

  • Run the display bgp vpnv4 all routing-table command on the PE or ASBR device to check the VPNv4 routes.

  • Run the display ip routing-table vpn-instance vpn-instance-name command on the PE or ASBR device to check whether the VPN routing table has related VPN routes.

Updated: 2019-04-03

Document ID: EDOC1100075353

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