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Configuration Guide - IP Multicast

CloudEngine 8800, 7800, 6800, and 5800 V200R005C00

This document describes the configurations of IP multicast, including IP multicast basics, IGMP, MLD, PIM (IPv4), PIM (IPv6), MSDP, multicast VPN, multicast route management (IPv4), multicast route management (IPv6), IGMP snooping, MLD snooping, static multicast MAC address, multicast VLAN, multicast network management.
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Licensing Requirements and Limitations for Static Multicast MAC Addresses

Licensing Requirements and Limitations for Static Multicast MAC Addresses

Involved Network Elements

An IPv4 multicast network may have the following network elements:
  • Multicast source: sends multicast data to receiver hosts. A video server is an example of a multicast source.
  • Device running IPv4 Protocol Independent Multicast (PIM): uses the IPv4 PIM protocol to generate 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.
  • Device running the Multicast Source Discovery Protocol (MSDP): forwards multicast data from one PIM network to another. MSDP is mainly used on large-scale networks. If multicast data needs to be transmitted between two autonomous systems (ASs), the devices at the border of the two ASs must run the MSDP protocol.
  • IGMP querier: 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 which multicast groups users want to join, and therefore cannot establish multicast forwarding paths.
  • Device running IGMP snooping: 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, configure IGMP snooping on Layer 2 devices.
  • Receiver: receives multicast data. A receiver can be a PC, a set top box, or any device with a multicast client installed.

Licensing Requirements

Static multicast MAC address binding is a basic feature of a device and is not under license control.

Version Requirements

Table 11-1 Products and minimum versions supporting this feature

Product

Minimum Version Required

CE5810EI

V100R002C00

CE5850EI

V100R001C00

CE5850HI

V100R003C00

CE5855EI

V100R005C10

CE5880EI

V200R005C10

CE6810-48S4Q-LI/CE6810-48S-LI

V100R003C10

CE6810-32T16S4Q-LI/CE6810-24S2Q-LI

V100R005C10

CE6810EI

V100R003C00

CE6850EI

V100R001C00

CE6850-48S6Q-HI

V100R005C00

CE6850-48T6Q-HI/CE6850U-HI/CE6851HI

V100R005C10

CE6855HI

V200R001C00

CE6856HI

V200R002C50

CE6857EI

V200R005C10

CE6860EI

V200R002C50

CE6865EI

V200R005C00

CE6870-24S6CQ-EI/CE6870-48S6CQ-EI

V200R001C00

CE6870-48T6CQ-EI

V200R002C50

CE6875EI

V200R003C00

CE6880EI

V200R002C50

CE7850EI

V100R003C00

CE7855EI

V200R001C00

CE8850-32CQ-EI

V200R002C50

CE8850-64CQ-EI

V200R005C00

CE8860EI

V100R006C00

CE8861EI/CE8868EI

V200R005C10

Feature Limitations

  • Because static multicast MAC address is a Layer 2 multicast feature, all the static multicast MAC address configurations on interfaces mentioned in this chapter are performed on Layer 2 physical interfaces, including Eth-Trunk interfaces.
  • Before configuring a static multicast MAC address on an interface, ensure that the interface does not belong to a super VLAN.
  • If the static multicast MAC address configured on an interface is an IPv4 multicast MAC address (starting with 0x0100-5e and ending with bit 0), the validity of the static multicast MAC address in different scenarios is listed in the following table.

    Scenario

    Valid or invalid

    No other multicast services configured

    Valid

    Layer 3 multicast or both Layer 2 and Layer 3 multicast configured

    Valid

    IP address-based Layer 2 multicast forwarding

    Valid, but may cause conflicts

    MAC address-based Layer 2 multicast forwarding

    Valid, but may cause conflicts

    A conflict occurs in the following situation: If IGMP snooping is enabled, the switch forwards multicast packets based on destination MAC addresses of the packets. When a static multicast MAC address is configured, a conflict may occur, causing data forwarding errors. For example, VRRP sends protocol packets using IP multicast address 224.0.0.18, which is mapped to IP multicast MAC address 01-00-5E-00-00-12. If this IP multicast MAC address is configured as a static multicast MAC address on an interface, VRRP protocol packets cannot be forwarded normally.

  • An M-LAG does not support static multicast MAC addresses.
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Updated: 2019-04-20

Document ID: EDOC1100039595

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