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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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Licensing Requirements and Limitations for IGMP

Licensing Requirements and Limitations for IGMP

Involved Network Elements

An IPv4 multicast network consists of the following network elements:
  • Multicast source

    A device that sends multicast data to receiver hosts. For example, a video server is a multicast source.

  • IPv4 Protocol Independent Multicast (PIM) device

    A device that uses the IPv4 PIM protocol to generate and maintain multicast routing entries and forwards multicast data based on multicast routing entries. On an IPv4 multicast network, all Layer 3 devices must run IPv4 PIM; otherwise, multicast forwarding paths cannot be established.

  • Multicast Source Discovery Protocol (MSDP) device

    A device that forwards multicast data from one PIM network to another. For example, if multicast data needs to be transmitted between two autonomous systems (ASs), the devices at the border of the ASs must run the MSDP protocol.

  • Multicast VPN device

    Multicast VPN enables multicast data of a private network to be transmitted over a public network. Multicast VPN devices are used on VPN networks. For example, if two sites of a VPN network need to exchange multicast data across a public network, multicast VPN needs to be configured on the PE devices.

  • IGMP querier

    A device that exchanges IGMP messages with receiver hosts to create and maintain group memberships. On a multicast network, Layer 3 devices connected to network segments of receivers must run the IGMP protocol or be configured with static IGMP groups. Otherwise, upstream PIM devices cannot know the multicast groups that users want to join, and therefore cannot establish multicast forwarding paths.

  • IGMP snooping device

    A device that listens to IGMP messages exchanged between upstream Layer 3 multicast devices and receiver hosts to create and maintain Layer 2 multicast forwarding entries, which are used for accurate multicast data forwarding on a Layer 2 network. To prevent broadcasting of multicast packets on a Layer 2 network and conserve network bandwidth, it is recommended that you configure IGMP snooping on Layer 2 devices.

  • Receiver

    A multicast user that receives multicast data. A receiver can be a PC, a set top box, or any device with multicast client installed.

The "IGMP Configuration" chapter is about configuring a Layer 3 device as an IGMP querier.

Licensing Requirements

IGMP is a basic feature of a switch and is not under license control.

Version Requirements

Table 2-8  Products and versions supporting IGMP
Product Product Model Software Version
S7700

S7703, S7706, and S7712

V100R003C01, V100R006C00, V200R001(C00&C01), V200R002C00, V200R003C00, V200R005C00, V200R006C00, V200R007C00, V200R008C00, V200R009C00, V200R010C00, V200R011C10, V200R012C00, V200R013C00

S7703 PoE

V200R013C00

S7706 PoE

V200R013C00

S9700

S9703, S9706, and S9712

V200R001(C00&C01), V200R002C00, V200R003C00, V200R005C00, V200R006C00, V200R007(C00&C10), V200R008C00, V200R009C00, V200R010C00, V200R011C10, V200R012C00, V200R013C00

NOTE:
For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Feature Limitations

  • V200R005 and later versions support IGMP configuration on physical interfaces that have been switched to Layer 3 mode using the undo portswitch command.
  • Since V200R010, IGMP can be configured on dot1q and QinQ termination sub-interfaces. When configuring IGMP on a dot1q or QinQ termination sub-interface, pay attention to the following points:
    • If IGMPv3 is running between user hosts and an IGMP querier, the group addresses in any-source multicast requests (unspecified source S and specified group G) sent from the user hosts must be out of the source-specific multicast (SSM) group range.
    • If IGMPv3 is running between user hosts and an IGMP querier, the group addresses in source-specific multicast requests (specified source S and group G) sent from the user hosts must be in the SSM group range.
    • If SSM mapping is used to implement source-specific multicast forwarding between user hosts and an IGMP querier, the group addresses in source-specific multicast requests (specified source S and group G) sent from the user hosts must be in the SSM group range.
    • If IGMPv3 is running between user hosts and an IGMP querier, source-and-group-specific multicast requests (specified source S and group G) sent from the user hosts support only the Include mode for source filtering and do not support the Exclude mode.
    • The SSM group address range can be changed by configuring an SSM policy. The default range is 232.0.0.0 to 232.255.255.255.
  • When IGMP multi-instance is configured, physical interfaces that have been switched to the Layer 3 mode using the undo portswitch cannot be bound to the VPN instances.
  • The switch supports wireless access to an IPv4 multicast network since V200R006. When wireless users connect to the IPv4 multicast network, the switch's Layer 3 interfaces toward wireless users do not support IGMP SSM mapping and static multicast group configuration.
  • If both Layer 2 and Layer 3 multicast services are required in a VLAN, enable IGMP on the corresponding VLANIF interface first, and then enable IGMP snooping in the VLAN. If IGMP snooping is enabled in the VLAN first, IGMP cannot be enabled on the VLANIF interface.
  • V200R013C00 and later versions: Assume that two VAP profiles are configured for an AP connected to the switch, the forwarding mode in one VAP profile is tunnel forwarding, and the forwarding mode in the other VAP profile is direct forwarding. When two users access the network using the two profiles, the user who accesses the network using the VAP profile configured with direct forwarding mode will receive both directly forwarded and tunnelled multicast traffic. You are not advised to configure two VAP profiles in tunnel forwarding and direct forwarding modes on the same AP.
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Updated: 2019-04-08

Document ID: EDOC1100065742

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