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CX11x, CX31x, CX710 (Earlier Than V6.03), and CX91x Series Switch Modules V100R001C10 Configuration Guide 13

The documents describe the configuration of various services supported by the CX11x&CX31x&CX91x series switch modules The description covers configuration examples and function configurations.
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Configuration Task Summary

Configuration Task Summary

This section describes IGMP snooping configuration tasks.

Table 8-98 lists IGMP snooping configuration tasks.

Table 8-98 IGMP snooping configuration tasks

Scenario

Description

Task

Configure basic function of IGMP snooping

When multicast data is forwarded to a Layer 2 multicast device connected to a user network segment, configure IGMP snooping on the Layer 2 multicast device to prevent multicast data from being flooded in the broadcast domain and to accurately forward multicast data at Layer 2. After IGMP snooping is configured, the Layer 2 multicast device can snoop and analyze IGMP messages between multicast users and the upstream router. The Layer 2 multicast device sets up Layer 2 multicast forwarding entries to control forwarding of multicast data. In this way, multicast data is not broadcast on the Layer 2 network.

Configuring Basic IGMP Snooping Functions

Configure the IGMP snooping proxy function

You can configure the IGMP snooping proxy function on a Layer 2 multicast device in either of the following situations:

  • IGMP is not enabled on a Layer 3 multicast device (for example, static multicast groups are configured), and no IGMP querier is available on the network to maintain multicast membership. After IGMP snooping proxy is configured on a Layer 2 multicast device, the device functions as the IGMP querier to send Query messages to receiver hosts.
  • IGMP is enabled on a Layer 3 multicast device. To reduce the number of IGMP Report/Leave messages transmitted between the Layer 3 multicast device and network segments of receiver hosts, configure IGMP snooping proxy on the Layer 2 multicast device between the Layer 3 multicast device and receiver hosts. The Layer 2 multicast device forwards IGMP Report or Leave messages from receiver hosts to the upstream device and sends Query messages from the upstream device to receiver hosts.
Configuring IGMP Snooping Proxy

Configure an IGMP snooping policy

To filter out multicast messages on a Layer 2 multicast device or limit the range of multicast groups that hosts can join, configure an IGMP snooping policy on the Layer 2 multicast device.

Configuring the IGMP Snooping Policy

Configure quick membership update

To improve running efficiency of multicast services and user experience, configure quick membership update on a Layer 2 multicast device so that the Layer 2 multicast device quickly updates entries when receiver hosts join or leave a multicast group.

Configuring Membership Fast-Update

Configure IGMP snooping SSM mapping

On a Layer 2 network, some receiver hosts can only run IGMPv1 or IGMPv2. To allow these hosts to user SSM, configure IGMP snooping SSM mapping on the Layer 2 multicast device.

Configuring IGMP Snooping SSM Mapping
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Updated: 2019-12-13

Document ID: EDOC1000041694

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