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Configuration Guide - IP Multicast

S7700 and S9700 V200R010C00

This document describes IP multicast basics and how to configure IP multicast features, including IGMP/MLD, PIM (IPv4&IPv6), MSDP, multicast VPN, Layer 3 multicast CAC, Layer 2 multicast CAC, IGMP/MLD snooping, and multicast VLAN, IPv4&IPv6 multicast route management, static multicast MAC address, multicast network.
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Configuring Layer 2 Multicast CAC for All Multicast Groups

Configuring Layer 2 Multicast CAC for All Multicast Groups

Pre-configuration Tasks

Before configuring Layer 2 multicast CAC for all multicast groups, enable IGMP snooping to implement forwarding of multicast packets.

Context

On a virtual private LAN service (VPLS) network, Layer 2 multicast CAC can limit the number of all multicast groups at three levels: global, virtual switching instance (VSI), and attachment circuit (AC) side or pseudo wire (PW) side interface. CAC limit values at different levels can be used together to flexibly control the number of multicast groups.

Procedure

  • Limiting the number of multicast groups globally
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      l2-multicast limit max-entry count [ except acl-number ]

      A global CAC limit is configured for all multicast groups in the system.

  • Limiting the number of multicast groups in a virtual switching instance (VSI)
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      vsi vsi-name

      The VSI view is displayed.

    3. Run:

      l2-multicast limit max-entry count [ except acl-number ]

      A CAC limit is configured for multicast groups in the VSI.

  • Limiting the number of multicast groups on an AC-side interface
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      interface interface-type interface-number

      The interface view is displayed.

    3. Run:

      l2-multicast limit max-entry count [ except acl-number ]

      A CAC limit is configured for multicast groups on the AC-side interface.

      NOTE:

      Perform this step if the AC-side interface bound to the VSI is a physical interface that has been switched to Layer 3 mode using the undo portswitch command. If the interface is a VLANIF interface, you can configure a CAC limit on the Layer 2 interface in the corresponding VLAN. For details, see l2-multicast limit max-entry count [ vlan { vlan-id1 [ to vlan-id2 ] } &<1-10> ] [ except acl-number ] in "VLAN-based Layer 2 CAC Commands."

  • Limiting the number of multicast groups on a PW-side interface
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      vsi vsi-name

      The VSI view is displayed.

    3. Run:

      pwsignal ldp

      The VSI-LDP view is displayed.

    4. Run:

      l2-multicast limit max-entry count [ except acl-number ] remote-peer ip-address [ negotiation-vc-id vc-id ]

      A CAC limit is configured for multicast groups on the PW-side interface.

Checking the Configuration

After you complete the preceding configurations, run the following commands to check the configuration.

  • Run the display l2-multicast limit configuration global command to check the global Layer 2 multicast CAC configuration.
  • Run the display l2-multicast limit configuration vsi [ vsi-name ] command to check the Layer 2 multicast CAC configuration in a VSI.
  • Run the display l2-multicast limit interface interface-type interface-number command to check the Layer 2 multicast CAC configuration on an AC-side interface.
  • Run the display l2-multicast limit configuration vsi vsi-name remote-peer ip-address [ negotiation-vc-id vc-id ] command to check the Layer 2 multicast CAC configuration on a PW-side interface.
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Updated: 2019-08-21

Document ID: EDOC1000141903

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