Users Guide
MLD timers
All non-queriers have a timer that is refreshed when it hears a general query. If the timer expires, then the router can assume that the
querier is not present, and so it assumes the role of querier. The other querier present interval, or querier timeout interval, is the amount of
time that passes before a non-querier router assumes that there is no longer a querier on the link.
To adjust the query interval, use the following command:
NOTE: Query interval is the amount of time between general queries sent by the querier.
INTERFACE Mode
ipv6 mld query-interval
Reducing Host Response Burstiness
General Queries contain a Query Response Interval value, which is the amount of time the host has to respond to a general query. Hosts
set a timer to a random number less than the Query Response Interval upon receiving a general query, and send a report when the timer
expires. Increasing this value spreads host responses over a greater period of time, and so reduces response burstiness.
To adjust the query response time, use the following command:
INTERFACE Mode
ipv6 mld query-max-resp-time
Clearing MLD groups
Clear a specic group or all groups on an interface from the multicast routing table.
To clear MLD groups, use the following command:
EXEC Privilege
clear ipv6 mld groups
Debugging MLD
Display Dell Networking OS messages about the MLD process.
To display debugging messages, use the following command:
EXEC Privilege
debug ipv6 mld
Explicit Tracking
If the Querier does not receive a response to a Multicast-Address-Specic Query, it sends another. Then, after no response, it removes the
group entry from the group membership table. You can congure the system to remove specied groups immediately after receiving a
Leave message to reduce leave latency.
To congure the system to remove a group immediately after receiving a Leave message, use the following command:
1178
Multicast Listener Discovery Protocol