User Manual
UMN:CLI
V8102
549
11.1.6
MLD Querier Configuration
An MLD querier is the router periodically sends a General Query message for managing
the multicast group. In MLD version1, the querier is a router with the lowest IPv6 ad-
dress on the subnet. If the router hears no queries for the timeout period, it becomes the
MLD querier.
11.1.6.1
MLD Query Interval
The MLD querier sends general query messages periodically to discover which multicast
groups have members on the attached networks of the router.
To specify an interval to send MLD query messages, use the following command.
Command
Mode
Description
ipv6 mld query-interval
<1-18000>
Interface
[VLAN]
Specifies a general query interval.
1-18000: query interval (default: 125 seconds)
no ipv6 mld query-interval
Deletes a specified general query interval.
11.1.6.2
MLD Query Response Time
In MLD version 1 and 2, membership query messages include the maximum query re-
sponse time field. This field specifies the maximum time allowed before sending a re-
sponding report. The maximum query response time allows a router to quickly detect that
there are no more directly connected group members on a network segment.
To specify a maximum query response time advertised in membership query messages,
use the following command.
Command
Mode
Description
ipv6 mld query-max-response-
time
<1-240>
Interface
[VLAN]
Specifies a maximum query response time.
1-240: maximum response time (default: 10 seconds)
no
ipv6
mld
query-max-
response-time
Deletes a specified maximum query response time.
11.1.6.3
MLD Querier Timeout
There should be a MLD querier on a network segment to prevent duplicating multicast
traffic for connected hosts. When there are several routers, if the router has the lowest
IPv6 address or if the router hears no queries during the timeout period, it becomes the
querier.
To specify a timeout period before a router takes over as a querier for the interface after
the previous querier has stopped querying, use the following command.
Command
Mode
Description
ipv6 mld querier-timeout
<60-
300>
Interface
[VLAN]
Specifies an MLD queier timeout period.
60-300: MLD previous querier-timeout value (default:
255 seconds)
no ipv6 mld querier-timeout
Deletes a specified MLD queier timeout value.
