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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 12

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Maintaining IGMP Snooping

Maintaining IGMP Snooping

You can maintain the IGMP snooping feature by clearing IGMP snooping entries, clearing IGMP snooping statistics, monitoring IGMP snooping running status, and monitoring IGMP snooping running status.

Clearing IGMP Snooping Entries

Context

IGMP snooping entries are classified into static and dynamic entries, and they are cleared in different ways.

Static entries cannot be restored after being cleared and can be created when you configure static member ports.

When dynamic entries in a forwarding table are cleared, the hosts in the VLAN do not receive the multicast packets temporarily. The hosts in the VLAN receive the multicast packets again only after the hosts send IGMP Report messages and the forwarding entries are regenerated on the switch modules.

Procedure

  • Run the undo igmp snooping static-group [ source-address source-ip-address ] group-address group-ip-address vlan { all | { vlan-id1 [ to vlan-id2 ] } &<1-10> } command in the interface view to remove the interface from a multicast group.

    You can run the following commands to batch remove the multicast group addresses that the interface joins.

    • undo igmp snooping static-group [ source-address source-ip-address ] group-address group-ip-address1 to group-ip-address2 vlan vlan-id
    • undo igmp snooping static-group [ source-address source-ip-address ] group-address all vlan { all | { vlan-id1 [ to vlan-id2 ] } &<1-10> }

  • Run the reset igmp snooping group { all | vlan { all | vlan-id } } command in the user view to remove dynamic entries in a forwarding table.

Clearing IGMP Snooping Statistics

Context

IGMP snooping statistics include the number of IGMP Report, Leave, and Query messages received in a VLAN. To collect IGMP snooping statistics in a period of time, run the reset command to set the IGMP snooping statistics to 0.

IGMP snooping statistics cannot be restored after being cleared. Exercise caution when you use the command.

Procedure

  • Run the reset igmp snooping statistics { all | vlan { vlan-id | all } } command in the user view to clear IGMP snooping statistics.

Displaying the IGMP Snooping Running Status

Context

To check the IGMP snooping running status during routine maintenance, run the following display commands in any view.

Procedure

  • Run the display igmp snooping [ vlan [ vlan-id ] ] command to check all the IGMP snooping running parameters in a VLAN.
  • Run the display igmp snooping [ vlan [ vlan-id ] ] configuration command to check the IGMP snooping configuration in a VLAN.
  • Run the display igmp snooping port-info [ vlan vlan-id [ group-address group-address ] ] [ verbose ] command to check information about member ports.
  • Run the display igmp snooping router-port vlan vlan-id command to check information about router ports.
  • Run the display igmp snooping querier vlan [ vlan-id ] command to check information about the IGMP snooping querier.
  • Run the display igmp snooping statistics vlan [ vlan-id ] command to check IGMP snooping statistics.
  • Run the display multicast layer-2 forwarding-mode vlan [ vlan-id ] command to check the multicast forwarding mode.
  • Run the display multicast layer-2 ip fib [ vlan vlan-id [ [ source source-address ] group group-address] ] command to check the multicast forwarding table in a VLAN.
  • Run the display igmp snooping group interface interface-type interface-number vlan vlan-id [ [ source-address source-address ] group-address group-address ] command to check information about multicast groups that are learned dynamically.

Configuring the Maximum Number of Invalid Layer 2 Multicast Protocol Packets Allowed on a Multicast Device

Usage Scenario

If forwarding entries cannot be created on a multicast network, configure the maximum number of invalid Layer 2 multicast protocol packets allowed on a multicast device. Then, you can locate and rectify the fault based on statistics and detailed information about invalid Layer 2 multicast protocol packets.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    multicast layer-2 invalid-packet igmp snooping max-count max-number

    The maximum number of invalid Layer 2 multicast protocol packets allowed on a multicast device is specified.

    By default, a multicast device can store a maximum of 10 invalid Layer 2 multicast protocol packets.

  3. Run:

    commit

    The configuration is committed.

Checking the Configurations

Run the display current-configuration | include multicast layer-2 invalid-packet command to check the maximum number of invalid Layer 2 multicast protocol packets allowed on a multicast device.

Run the display igmp snooping invalid-packet vlan [ vlan-id ] [ message-type { leave | query | report | hello } ] command to check statistics about invalid Layer 2 multicast protocol packets stored on a multicast device.

Run the display igmp snooping invalid-packet [ packet-number ] verbose command to check detailed information about invalid Layer 2 multicast protocol packets stored on a multicast device.

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Updated: 2019-08-09

Document ID: EDOC1000041694

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