(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.
  
  Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
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.
  
  Only the S5720-EI, S5720-HI, S5730-HI, S5731-H, S5731-S, S5731S-H, S5731S-S, S5732-H, S6720-EI, S6720-HI, S6720S-EI, S6730-H, S6730S-H, S6730-S, and S6730S-S support switching between Layer 2 and Layer 3 modes.
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.