Chapter 24
| Multicast Filtering Commands
MLD Snooping
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Command Usage
â—† If MLD immediate-leave is not used, a multicast router (or querier) will send a
group-specific query message when an MLD group leave message is received.
The router/querier stops forwarding traffic for that group only if no host replies
to the query within the specified timeout period.
â—† If MLD immediate-leave is enabled, the switch assumes that only one host is
connected to the interface. Therefore, immediate leave should only be enabled
on an interface if it is connected to only one MLD-enabled device, either a
service host or a neighbor running MLD snooping.
Example
The following shows how to enable MLD immediate leave.
Console(config)#interface vlan 1
Console(config-if)#ipv6 mld snooping immediate-leave
Console(config-if)#
ipv6 mld snooping
vlan mrouter
This command statically configures an IPv6 multicast router port. Use the no form
to remove the configuration.
Syntax
[no] ipv6 mld snooping vlan vlan-id mrouter interface
vlan-id - VLAN ID (Range: 1-4094)
interface
ethernet unit/port
unit - Unit identifier. (Range: 1-8)
port - Port number. (Range: 1-28/52)
port-channel channel-id (Range: 1-16)
Default Setting
No static multicast router ports are configured.
Command Mode
Global Configuration
Command Usage
Depending on your network connections, MLD snooping may not always be able
to locate the MLD querier. Therefore, if the MLD querier is a known multicast router/
switch connected over the network to an interface (port or trunk) on the switch,
you can manually configure that interface to join all the current multicast groups.
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