Manual

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Москва, Новозаводская ул., 18, стр. 1
292
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.
29.7.4 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>)
Ensure there is a vlan configured as a L2 general querier, or there is a static mrouter
configured in a segment,
Use command to check if the MLD snooping information is correct