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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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(Optional) Configuring the IGMP Proxy Interface Protection Mode

(Optional) Configuring the IGMP Proxy Interface Protection Mode

Context

Generally, the IGMP proxy function does not work if the upstream interface with IGMP proxy configured fails. To ensure normal operations of the IGMP service, the switch provides two IGMP proxy interface protection modes to enhance link reliability:

  • Active/standby mode: Enable IGMP proxy backup on another interface. This interface then acts as the backup IGMP proxy interface to protect the active IGMP proxy interface. If the active IGMP proxy interface fails, the upstream interface in multicast forwarding entries changes to the backup IGMP proxy interface to resume traffic forwarding quickly. When the active IGMP proxy interface recovers, the upstream interface in multicast forwarding entries restores to the active IGMP proxy interface.
  • Active/active mode: Configure IGMP proxy on multiple interfaces so that these interfaces act as active IGMP proxy interfaces. Multicast forwarding entries are distributed on these interfaces based on the hash algorithm to implement multicast load splitting. The IGMP proxy device sends Join/Leave messages to all the active IGMP proxy interfaces. The interfaces back up one another. If one of them fails, the upstream interface in the matching entries changes to all the other active IGMP proxy interfaces to resume traffic forwarding quickly. When the faulty active IGMP proxy interface recovers, it becomes an upstream in multicast forwarding entries again and multiple interfaces share multicast traffic based on the hash algorithm. The switch supports a maximum of eight interfaces for multicast load splitting.

Procedure

  • Configuring the active/standby mode
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. (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.

    4. Run igmp proxy backup

      IGMP proxy backup is enabled on the interface so that the interface becomes the backup IGMP proxy interface.

      By default, IGMP proxy backup is disabled on an interface.

  • Configuring the active/active mode
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. (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.

    4. Run igmp proxy

      The interface is configured as an IGMP proxy interface.

      By default, IGMP proxy is disabled on an interface.

    To configure multiple active IGMP proxy interfaces, repeat step 2 and step 3.

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Updated: 2019-04-08

Document ID: EDOC1100065742

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