Configuring Traffic Suppression over a VSI PW

This section describes how to configure traffic suppression over a virtual switch instance (VSI) pseudo wire (PW) to reduce the load that a large volume of traffic poses on the network.

Applicable Environment

Layer 2 traffic suppression prevents broadcast, multicast, and unknown unicast traffic from flooding a network and ensures sufficient bandwidth for forwarding unicast traffic.

On most networks, the unicast traffic rate is much higher than the rate of broadcast traffic, multicast traffic, or unknown unicast traffic. If broadcast, multicast, and unknown unicast traffic is not suppressed, a great amount of network bandwidth is consumed by such traffic, causing the network performance to deteriorate or even communication interruption. If interface-based traffic suppression is configured, broadcast traffic, multicast traffic, and unknown unicast traffic of all PWs created based on the interface are limited. To suppress traffic in a more flexible manner, you can configure VSI PW-based traffic suppression on broadcast, multicast, and unknown unicast traffic.

Pre-configuration Tasks

Before you configure traffic suppression over a VSI PW, complete the following tasks:

Connect interfaces of devices and configure physical parameters for the interfaces so that the physical status of the interfaces can be Up.
Enable MPLS L2VPN.

Procedure

Run system-view
The system view is displayed.
Run vsi vsi-name [ static ]
The VSI view is displayed.
Run suppression { inbound | outbound } enable
Traffic suppression is enabled in the VSI.
Enter the VSI-LDP-PW view, VSI-BGP-PW view, or VSI-BGPAD-PW view to configure traffic suppression on the LDP interface, BGP interface, or BGPAD interface of the VSI PW.
- Enter the VSI-LDP-PW view and configure traffic suppression on the LDP interface of the VSI PW.
  1. Run pwsignal ldp
    
    The VSI-LDP view is displayed.
  2. Run vsi-id vsi-id
    
    A VSI ID is configured.
  3. Run peer peer-address [ negotiation-vc-id vc-id ] pw pw-name
    
    A PW is created, and the VSI-LDP-PW view is displayed.
- Enter the VSI-BGP-PW view and configure traffic suppression on the BGP interface of the VSI PW.
  1. Run pwsignal bgp
    
    The VSI-BGP view is displayed.
  2. Run route-distinguisher route-distinguisher
    
    An RD is configured for the VSI.
  3. Run vpn-target vpn-target both
    
    The VSI is associated with a VPN target.
  4. Run peer peer-address remote-site remote-site-id pw pw-name
    
    A PW is created, and the VSI-BGP-PW view is displayed.
- Enter the VSI-BGPAD-PW view and configure traffic suppression on the BGPAD interface of the VSI PW.
  1. Run bgp-ad
    
    The BGP AD view is displayed.
  2. Run vpls-id vplsIdValue
    
    A VPLS ID is specified for a VSI.
  3. Run vpn-target vpn-target both
    
    The VSI is associated with a VPN target.
  4. Run peer peer-address pw pw-name
    
    A PW is created, and the VSI-BGPAD-PW view is displayed.
Run broadcast-suppression cir cir-value [ cbs cbs-value ]
Broadcast traffic over the VSI PW is suppressed.
Run multicast-suppression cir cir-value [ cbs cbs-value ]
Multicast traffic over the VSI PW is suppressed.
Run unknown-unicast-suppression cir cir-value [ cbs cbs-value ]
Unknown unicast traffic over the VSI PW is suppressed.
Run commit
The configuration is committed.

Verifying the Configuration of Traffic Suppression over a VSI PW: You can check statistics about Layer 2 traffic suppression on an interface.