SNR S2989G-8TX — настройка MLD Snooping и IPv6 для сетевых устройств [544/553]

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S2989G-24TX Operation Manual

Chapter 11 IPv6 Configuration

11-34

SwitchB(config)#ipv6 mld snooping vlan 100

SwitchB(config)#ipv6 mld snooping vlan 100 mrouter interface ethernet 1/0/1

Multicast configuration:

Same as scenario 1

MLD Snooping interception results:

Same as scenario 1

Scenario 3: To run in cooperation with layer 3 multicast protocols

SWITCH which is used in Scenario 1 is replaced with ROUTER with specific

configurations remains the same. And multicast and IGMP snooping configurations are

the same with what it is in Scenario 1. To configure PIM-SM6 on ROUTER, and enable

PIM-SM6 on vlan 100 (use the same PIM mode with the connected multicast router)

The configurations are listed as below:

switch#config

switch(config)#ipv6 pim multicast-routing

switch(config)#interface vlan 100

switch(config-if-vlan100)#ipv6 pim sparse-mode

MLD snooping does not distribute entries when layer 3 multicast protocol is enabled.

It only does the following tasks.

⚫ To remove the layer 2 multicast entries.

⚫ To provide query functions to the layer 3 with vlan, S, and G as the

parameters.

⚫ When layer 3 MLD is disabled, re-enable distributing layer 2 multicast

entries.

By looking up the layer 3 IP6MC entries, it can be found that ports can be indicated by the

layer 3 multicast entries. This ensures the MLD Snooping can work in cooperation with the

layer 3 multicast protocols.

11.5.2.4 MLD Snooping Troubleshooting

In configuring and using MLD Snooping, the MLD Snooping server may fail to run

properly due to physical connection failure, wrong configuration, etc. The user should

ensure the following:

 Ensure the physical connection is correct

 Ensure the MLD Snooping is enabled under global mode (using

ipv6 mld snooping)

 Ensure the MLD Snooping is configured on the vlan under global

mode (using ipv6 mld snooping vlan <vlan-id>）