Configuring Layer 2 Multicast CAC in a VSI Scenario

Layer 2 multicast CAC configurations are performed in a VSI scenario to limit the multicast group number and bandwidth.

Context

On the network shown in Figure 1, PE1 is downlinked to a residential network and uplinked to PE2 through a VPLS network to access an IPTV server on the Internet. To ensure high PE1 performance, stable multicast data transmission on PE1, and good IPTV service experience, configure Layer 2 multicast CAC for specific VSIs on PE1. If all programs of a service provider are grouped into one or more VSI channels, Layer 2 multicast CAC can also be configured to limit the bandwidth to a specific value for each multicast group in a VSI channel.

Figure 1 Configuring Layer 2 multicast CAC for a VSI

On this network, PE1 is a Layer 2 device on which VSI-based Layer 2 multicast CAC needs to be configured.
Before configuring Layer 2 multicast CAC for a VSI, configure an LDP-based VSI.
Before configuring Layer 2 multicast CAC for a sub-interface, configure the sub-interface as a dot1q termination sub-interface and bind the sub-interface to the LDP-based VSI.

Layer 2 multicast CAC configurations can be performed for a VSI channel and for a sub-interface in a VSI.

Procedure

Configure Layer 2 multicast CAC for a VSI.
1. Run system-view
  The system view is displayed.
2. Run vsi vsi-name
  A VSI is created, and the VSI view is displayed.
3. Run l2-multicast limit max-entry count [ except { acl-number | acl-name acl-name } ]
  A multicast group number limit is configured.
4. Run commit
  The configuration is committed.
5. Run quit
  Exit from the VSI view.
Configure Layer 2 multicast CAC for a VSI channel.
1. Run system-view
  The system view is displayed.
2. Run l2-multicast-channel vsi vsi-name
  The VSI channel view is displayed.
3. Run channel channel-name type { asm | ssm }
  A VSI channel is created.
  
  A VSI channel name must be different from a global channel name.
4. Run group group-address { group-mask-length | group-mask } [ per-bandwidth bandwidth ]
  Multicast groups are specified for the channel. If per-bandwidth bandwidth is set, the bandwidth is limited to a specific value for each multicast group in the VSI channel. If this parameter is not set, the bandwidth is not limited for any multicast group in the VSI channel.
  - Multicast group addresses specified for VSI channels must be different from those specified for global channels.
  - A multicast group address can be specified only for one channel in the same VSI.
5. (Optional) Run unspecified-channel deny
  The device is enabled to filter out multicast data for groups undefined in a VSI channel.
  
  After this command is run, the device permits only multicast data for groups defined in a VSI channel and denies all multicast data for groups undefined in a VSI channel.
6. Run commit
  The configuration is committed.
7. Run quit
  Exit from the channel view.
8. Run quit
  Exit from the VSI channel view.
Configure Layer 2 multicast CAC for a sub-interface in a VSI.
1. Run interface interface-type interface-number.subnumber
  The Eth-Trunk sub-interface view is displayed.
2. Run l2-multicast limit [ channel channel-name ] bandwidth bandwidth dot1q { vid1 [ to vid2 ] } &<1-10>
  The bandwidth is limited to a specific value for the dot1q termination sub-interface.
3. Run l2-multicast limit per-trunk-member bandwidth bandwidth dot1q { vid1 [ to vid2 ] } &<1-10>
  The bandwidth is limited to a specific value for each Eth-Trunk member interface.
  
  The order of performing steps 2 and 3 is not restricted. Perform one or both of the two steps as needed.
4. Run commit
  The configuration is committed.