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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 Layer 2 Multicast CAC

Licensing Requirements and Limitations for Layer 2 Multicast CAC

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.

Layer 2 multicast CAC is a Layer 2 multicast feature that can be configured on a device running IGMP snooping.

Licensing Requirements

VLAN-based Layer 2 multicast CAC is a basic feature of a switch and is not under license control. VSI-based Layer 2 multicast CAC applies to a virtual private LAN service (VPLS) network, whereas the MPLS feature used to establish a VPLS network requires a license.

For details about how to apply for a license, see Obtaining Licenses in the S7700 and S9700 Series Switches License Usage Guide.

Version Requirements

Table 15-3  Products and versions supporting Layer 2 multicast CAC
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

When configuring Layer 2 multicast CAC on a switch, pay attention to the following points:

  • Configure IGMP snooping before you configure Layer 2 multicast CAC.
  • The switch supports VSI-based Layer 2 multicast CAC since V200R005.
  • All interface configurations (except PW-side interface configurations) involved in Layer 2 multicast CAC are performed on Ethernet interfaces.
  • The VLAN-based Layer 2 multicast CAC configurations at different levels take effect in the order of interface+VLAN, interface, VLAN, and global. The VSI-based Layer 2 multicast CAC configurations at different levels take effect in the order of interface, VSI, and global. It is recommended that you plan limit values at different levels before the configuration. If the limit values are not properly configured, some limit values may be useless. For example, if you set the global limit to 100 and the limit on an interface to 200, the actual limit on the interface is 100.
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Updated: 2019-04-08

Document ID: EDOC1100065742

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