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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 a Channel

Configuring Layer 2 Multicast CAC for a Channel

Pre-configuration Tasks

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

Configuration Process

Perform the following tasks in the listed order.

Configuring a Group Address Range for a Channel

Context

To control the number of multicast groups in a specified channel, configure a group address range for the channel. You can create a global channel or VLAN channel. A global channel takes effect for all VLANs, and a VLAN channel takes effect only for the specific VLAN. A VLAN channel cannot have the same name as a global channel.

After you configure a group address range for a channel, the switch forwards multicast data to all groups by default, including the groups out of the configured range. If you want the switch to forward only multicast data of the groups in the configured range, run the unspecified-channel deny command to filter out multicast data of groups out of the range.

Procedure

  • Configuring a global channel
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      l2-multicast-channel

      The global l2-multicast-channel view is displayed.

    3. Run:

      channel channel-name type { asm | ssm }

      A channel is created, and the channel view is displayed.

    4. Run:

      group group-address { group-mask-length | group-mask } [ source source-address { source-mask-length | source-mask } ]

      A group address range is configured for the global channel.

    5. Run:

      quit

      Exit from the channel view.

    6. (Optional) Run:

      unspecified-channel deny

      The device is configured not to forward multicast data to the groups out of the group address range.

  • Configuring a VLAN channel
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      l2-multicast-channel vlan vlan-id

      The VLAN l2-multicast-channel view is displayed.

    3. Run:

      channel channel-name type { asm | ssm }

      A channel is created, and the channel view is displayed.

    4. Run:

      group group-address { group-mask-length | group-mask } [ source source-address { source-mask-length | source-mask } ]

      A group address range is configured for the VLAN channel.

      NOTE:

      The group address range for a VLAN channel cannot overlap with the group address ranges for other channels in the same VLAN or the group address ranges of global channels.

    5. Run:

      quit

      Exit from the channel view.

    6. (Optional) Run:

      unspecified-channel deny

      The device is configured not to forward multicast data to the groups out of the group address range.

Limiting the Number of Multicast Groups in a Channel

Context

Layer 2 multicast CAC can limit the number of multicast groups in a channel at four levels: global, VLAN, interface, and interface+VLAN. The limit values at different levels can be used together to flexibly control the number of multicast groups.

Procedure

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

      system-view

      The system view is displayed.

    2. Run:

      l2-multicast limit channel channel-name max-entry count

      A global CAC limit is configured for multicast groups in a channel.

  • Limiting the number of multicast groups in a channel in specified VLANs
    1. Run:

      system-view

      The system view is displayed.

    2. Run:

      l2-multicast limit channel channel-name max-entry count vlan { vlan-id1 [ to vlan-id2 ] } &<1-10>

      A CAC limit is configured for multicast groups in a channel in the specified VLANs.

  • Limiting the number of multicast groups in a channel on an 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 channel channel-name max-entry count

      A CAC limit is configured for multicast groups in a channel on the interface.

  • Limiting the number of multicast groups in a channel in specified VLANs on an 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 channel channel-name max-entry count vlan { vlan-id1 [ to vlan-id2 ] } &<1-10>

      A CAC limit is configured for multicast groups in a channel in the specified VLANs on the interface.

Checking the Configuration

Prerequisites

The Layer 2 multicast CAC configurations for a channel are completed.

Procedure

  • Run the display l2-multicast limit configuration global channel channel-name command to check the global Layer 2 multicast CAC configuration for a channel.
  • Run the display l2-multicast limit configuration vlan [ vlan-id1 [ to vlan-id2 ] ] channel channel-name command to check the Layer 2 multicast CAC configuration for a channel in specified VLANs.
  • Run the display l2-multicast limit configuration interface interface-type interface-number channel channel-name command to check the Layer 2 multicast CAC configuration for a channel on an interface.
  • Run the display l2-multicast limit configuration vlan vlan-id1 [ to vlan-id2 ] interface interface-type interface-number channel channel-name command to check the Layer 2 multicast CAC configuration for a channel in specified VLANs on an interface.
  • Run the display l2-multicast-channel [ vlan [ vlan-id1 [ to vlan-id2 ] ] | global ] [ channel channel-name ] command to check the configuration of a channel.
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Updated: 2019-08-21

Document ID: EDOC1000141903

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