Configuring a Local BGP VPWS Connection

If two CEs connect to the same PE, you can configure a local BGP VPWS connection for the two CEs to communicate.

Context

On the network shown in Figure 1, CE1 and CE2 connect to the same PE. A local BGP VPWS connection needs to be established between CE1 and CE2 for them to communicate. After the connection is established, the PE can function like a Layer 2 switch to directly transmit packets, without using any static LSP.

Figure 1 Configuring a local BGP VPWS connection

Procedure

Enable MPLS L2VPN.
1. Run system-view
  The system view is displayed.
2. Run mpls l2vpn
  MPLS L2VPN is enabled.
3. Run quit
  Return to the system view.
Configure a local BGP VPWS connection.
1. Run mpls l2vpn l2vpn-name [ encapsulation encapsulation-type [ control-word | no-control-word ] ]
  A BGP VPWS instance is created, and the MPLS-L2VPN instance view is displayed.
  
  If heterogeneous interworking is required, specify encapsulation-type as ip-interworking for successful PW establishment.
2. Run route-distinguisher route-distinguisher
  An RD is configured for the L2VPN instance.
3. (Optional) Run mtu mtu-value
  An MTU is configured for the L2VPN instance.
  
  The MTU size determines the maximum packet size allowed by a VPWS network. If the MTU exceeds the maximum packet size allowed by a VPWS network or an intermediate node (P), packet fragmentation or even drop will occur, affecting network transmission. The MTU is one of the VPWS negotiation parameters. If the MTUs of the same L2VPN instance on the endpoint PEs are different, the two PEs cannot exchange reachability information or establish a PW. An appropriate MTU must be set for an L2VPN instance based on the MTU of the interface bound to the L2VPN instance. Specifically, the MTU of an L2VPN instance must be less than or equal to the MTU of the interface bound to the L2VPN instance.
4. (Optional) Run ignore-mtu-match
  The current device is configured not to perform the MTU match check.
  
  If the MTUs of the same L2VPN instance on the two endpoint PEs do not match, the VC cannot go Up. If some devices do not support the MTU match check, run the ignore-mtu-match command to disable this check.
5. Run ce ce-name [ id ce-id [ range ce-range ] [ default-offset ce-offset ] ]
  A CE is created in the L2VPN instance.
6. Run connection [ ce-offset ce-offset-id ] interface interface-type interface-number [ tunnel-policy tunnel-policy-name ] [ raw | tagged ] [ secondary ]
  A local BGP VPWS connection is configured.
Run commit
The configuration is committed.