Cisco 500 Series Administration Manual page 334

Multicast
IPv6 Multicast Configuration
NOTE
NOTE
STEP 1
Cisco 500 Series Managed Switch Administration Guide
Changes in MLD Snooping timers configuration, such as: Query Robustness, Query
Interval etc. do not take effect on timers which were already created.
MLD Interface Settings
This page is only found on SG500X/SG500XG devices.
An interface that is defined as a Multicast router port receives all MLD packets
(reports and queries) as well as all Multicast data.
To configure an interface as a Multicast router interface:
Click Multicast > IPv6 Multicast Configuration > MLD Interface Settings.
The following fields are displayed for each interface on which MLD is enabled:
• Router MLD Version—MLD version of the Multicast router.
• Query Robustness—Enter the number of expected packet losses on a link.
• Query Interval (sec)—Interval between the general queries to be used if
this device is the elected querier.
• Query Max Response Interval (sec)—Delay used to calculate the Maximum
Response Code inserted into the periodic general queries.
• Last Member Query Interval (msec)—Maximum Response Delay to be
used if the device cannot read Max Response Time value from group-
specific queries sent by the elected querier.
• Multicast TTL Threshold—Enter the Time-to-Live (TTL) threshold of
packets being forwarded on an interface.
Multicast packets with a TTL value less than the threshold are not
forwarded on the interface.
The default value of 0 means all Multicast packets are forwarded on the
interface.
A value of 256 means that no Multicast packets are forwarded on the
interface.
Configure the TTL threshold only on border routers. Conversely, routers on
which you configure a TTL threshold value automatically become border
routers.
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