Mld Snooping In Switch Stacks - Cisco Catalyst 2960 series Configuration Manual

You set this value by using the ipv6 mld snooping tcn flood query count global configuration command.
The default is to send two queries. The switch also generates MLDv1 global Done messages with valid
link-local IPv6 source addresses when the switch becomes the STP root in the VLAN or when it is configured
by the user. This is same as done in IGMP snooping.

MLD Snooping in Switch Stacks

The MLD IPv6 group address databases are maintained on all switches in the stack, regardless of which switch
learns of an IPv6 multicast group. Report suppression and proxy reporting are done stack-wide. During the
maximum response time, only one received report for a group is forwarded to the multicast routers, regardless
of which switch the report arrives on.
The election of a new stack master does not affect the learning or bridging of IPv6 multicast data; bridging
of IPv6 multicast data does not stop during a stack master re-election. When a new switch is added to the
stack, it synchronizes the learned IPv6 multicast information from the stack master. Until the synchronization
is complete, data ingress on the newly added switch is treated as unknown multicast data.
How to Configure IPv6 MLD Snooping
Default MLD Snooping Configuration
Table 21: Default MLD Snooping Configuration
Feature
MLD snooping (Global)
MLD snooping (per VLAN)
IPv6 Multicast addresses
IPv6 Multicast router ports
MLD snooping Immediate Leave
MLD snooping robustness variable
Last listener query count
Last listener query interval
TCN query solicit
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
How to Configure IPv6 MLD Snooping
Default Setting
Disabled.
Enabled. MLD snooping must be globally enabled for VLAN
MLD snooping to take place.
None configured.
None configured.
Disabled.
Global: 2; Per VLAN: 0.
The VLAN value overrides the global setting. When
Note
the VLAN value is 0, the VLAN uses the global count.
Global: 2; Per VLAN: 0.
The VLAN value overrides the global setting. When
Note
the VLAN value is 0, the VLAN uses the global count.
Global: 1000 (1 second); VLAN: 0.
The VLAN value overrides the global setting. When
Note
the VLAN value is 0, the VLAN uses the global interval.
Disabled.
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