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Configuration Guide - IP Multicast

S7700 and S9700 V200R013C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, IPv4 PIM, IPv6 PIM, MSDP, multicast VPN, layer 3 multicast CAC, IPv4 multicast route management, IPv6 multicast route management, IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN replication, layer 2 multicast CAC, multicast network management.
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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 Procedure

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.

Verifying the Layer 2 Multicast CAC Configuration for a Channel

Prerequisites

The Layer 2 multicast CAC configuration for a channel is complete.

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: 2019-04-08

Document ID: EDOC1100065742

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