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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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(Optional) Configuring a Static IGMP Multicast Group on an Interface

(Optional) Configuring a Static IGMP Multicast Group on an Interface

Context

This configuration applies to some special scenarios, for example:

  • There are long-term group members on a network segment.

  • Hosts on a network segment cannot send Report messages, but multicast data needs to be forwarded to the network segment.

In these scenarios, you can configure a static multicast group on the switch interface connected to the network segment. Multicast data can then be quickly forwarded to the network segment or be directed to the interface. After a static multicast group is configured on an interface, the switch considers that the multicast group always has members on the network segment of the interface and always forwards multicast data of the group to the interface.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. On an Ethernet interface, run undo portswitch

    The interface is switched to Layer 3 mode.

    By default, an Ethernet interface works in Layer 2 mode.

    The mode switching function takes effect when the interface only has attribute configurations (for example, shutdown and description configurations). Alternatively, if configuration information supported by both Layer 2 and Layer 3 interfaces exists (for example, mode lacp and lacp system-id configurations), no configuration that is not supported after the working mode of the interface is switched can exist. If unsupported configurations exist on the interface, delete the configurations first and then run the undo portswitch command.

    NOTE:

    If many Ethernet interfaces need to be switched to Layer 3 mode, run the undo portswitch batch interface-type { interface-number1 [ to interface-number2 ] } &<1-10> command in the system view to switch these interfaces to Layer 3 mode in batches.

  4. For a Layer 3 sub-interface, run the following commands to configure termination of single-tagged packets on it.
    1. Run quit

      Return to the system view.

    2. Run interface interface-type interface-number.subinterface-number

      The Layer 3 sub-interface view is displayed.

      The subinterface-number parameter must specify a Layer 3 sub-interface number on an Ethernet interface that has been switched to the Layer 3 mode.

    3. Run dot1q termination vid vid

      Termination of Dot1q packets is configured on the Layer 3 sub-interface.

      By default, the termination of Dot1q packets is not configured on a Layer 3 sub-interface.

  5. Run the following commands to configure a static multicast group or source-group mapping on the interface.

    • For a Layer 3 sub-interface, run:
    • For another type of interface, run:

    By default, no static multicast group or source-group is configured on an interface.

    NOTE:

    If a static multicast group or source-group is configured on a loopback interface, the multicast switch forwards multicast data to its downstream device only when users request the data. If a static multicast group or source-group is configured on a non-loopback interface, the multicast switch forwards multicast data to its downstream device immediately after receiving the data. You can configure static multicast groups on a loopback interface if users have not requested data of these groups but may do so later. If some multicast groups have stable receivers on a network segment, you can configure the static multicast groups on the interface connected to this network segment.

  6. Run commit

    The configuration is committed.

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Updated: 2019-04-20

Document ID: EDOC1100075361

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