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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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Enabling IGMP

Enabling IGMP

Context

IP multicast routing is the prerequisite for all the multicast functions. Enable IP multicast routing before configuring any multicast protocol.

To configure IGMP functions on the switch, first enable IGMP on interfaces connected to group members.

Procedure

  • Enabling IGMP in the public network instance
    1. Run:

      system-view

      The system view is displayed.

    2. (Optional) Run:

      set multicast forwarding-table super-mode

      The high-specification mode is configured for multicast forwarding.

      In large-scale multicast applications, the switch generates a large number of IGMP group entries. When the number of IGMP group entries reaches the default limit, new IGMP group entries cannot be generated. The high-specification mode increases the number of IGMP group entries supported on the switch. After this mode is configured, the number of IGMP group entries can reach the maximum number supported by the switch, maximizing the switch's capability to support large-scale multicast applications.

      NOTE:
      • The high-specification mode takes effect after a restart.

      • After the high-specification mode is configured, the default value of the robustness variable changes from 2 to 3, the default value of the other querier present interval changes from 125s to 245s, and the default value of the IGMP general query interval changes from 60s to 120s.

    3. Run:

      multicast routing-enable

      IP multicast routing is enabled.

      By default, the IP multicast routing function is disabled.

    4. Run:

      interface interface-type interface-number

      The interface view is displayed.

    5. (Optional) 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.

    6. Run:

      igmp enable

      IGMP is enabled on the interface.

      By default, IGMP is disabled on an interface.

  • Enabling IGMP in a virtual private network (VPN) instance

    A VPN instance must exist before you enable IGMP in the VPN instance.

    1. Run:

      system-view

      The system view is displayed.

    2. (Optional) Run:

      set multicast forwarding-table super-mode

      The high-specification mode is configured for multicast forwarding.

    3. Run:

      ip vpn-instance vpn-instance-name

      The VPN instance view is displayed.

    4. Run:

      ipv4-family

      The IPv4 address family is enabled for the VPN instance, and the VPN instance IPv4 address family view is displayed.

    5. Run:

      route-distinguisher route-distinguisher

      An RD is configured for the VPN instance IPv4 address family.

    6. Run:

      multicast routing-enable

      IP multicast routing is enabled.

      By default, the IP multicast routing function is disabled.

    7. Run:

      quit

      Return to the VPN instance view.

    8. Run:

      quit

      Return to the system view.

    9. Run:

      interface interface-type interface-number

      The interface view is displayed.

      NOTE:

      When configuring multi-instance IGMP, you can bind VLANIF interfaces, sub-interfaces, loopback interfaces, or tunnel interfaces to VPN instances. The physical interfaces that have been switched to the Layer 3 mode using the undo portswitch command cannot be bound to VPN instances.

    10. Run:

      ip binding vpn-instance vpn-instance-name

      The interface is bound to a specified VPN instance.

      By default, an interface is a public network interface that is not associated with any VPN instance.

    11. Run:

      igmp enable

      IGMP is enabled on the interface.

      By default, IGMP is disabled on an interface.

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Updated: 2019-08-21

Document ID: EDOC1000141903

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