Configuring a FW to Send IGMP Packets Without the Router-Alert Option

If other IGMP interfaces on the same network segment with the user host need to receive the IGMP messages without Router-Alert options, you can configure the multicast device connected to the user network segment to send IGMP messages containing no Router-Alert options. By default, the multicast device sends IGMP messages containing Router-Alert options.

Prerequisites

Before configuring a FW to send IGMP packets without the Router-Alert option, complete the following task:

Configuring a unicast routing protocol
Configuring Basic IGMP Functions

Context

By default, the IGMP packets sent by FWs contain the Router-Alert option.

To configure a FW to send the IGMP packets without the Router-Alert option, perform the following steps on the FW connected to hosts.

The configuration involves the following cases:

Global configuration: It is valid on all interfaces.
Configuration on an interface: The configuration on an interface takes precedence over the global configuration. If the interface is not configured, the global configuration is used.

Procedure

Global Configuration
1. Access the system view.
  system-view
2. Access the IGMP view.
  igmp [ vpn-instance vpn-instance-name ]
3. Configure the header of a sent IGMP packet not to contain the Router-Alert option.
  undo send-router-alert
Configuration on an Interface
1. Access the system view.
  system-view
2. Access the interface view.
  interface interface-type interface-number
  
  The interface is connected to hosts or a switch.
3. Configure the header of a sent IGMP packet not to contain the Router-Alert option.
  undo igmp send-router-alert