Allied Telesis AT-S63 - Manual (Page 126)

Chapter 10: IGMP Snooping
126 Section II: Advanced Operations
4. Click the Apply button.Your changes are immediately implemented on
the stack.
5. To save your changes in the master configuration file, click the Save
Config button in the Configuration menu.
Host/Router Timeout
Interval Specifies the time period in seconds for
determining inactive host nodes. An
inactive host node is a node that has not
sent an IGMP report during the specified
time interval. The range is from 0 second
to 86,400 seconds (24 hours). The default
is 260 seconds. If you set the timeout to
zero (0), the timeout interval is disabled
and inactive host nodes are never timed
out.
This parameter also controls the time
interval used to determine whether a
multicast router is still active. The stack
makes the determination by watching for
queries from the router. If the stack does
not detect any queries from a multicast
router during the specified time interval,
the router is considered inactive on the
port.
The actual timeout may be ten seconds
less that the specified value. For example,
a setting of 25 seconds can result in the
stack classifying a host node or multicast
router as inactive after just 15 seconds. A
setting of 10 seconds or less can result in
the immediate timeout of an inactive host
node or router.
Maximum Multicast
Groups Specifies the maximum number of IGMP
multicast groups the stack can learn. This
parameter is useful with networks that
contain a large number of multicast
groups. The range is 0 to 255 groups. The
default is 64 multicast groups.
The combined number of multicast
address groups for IGMP and MLD
snooping cannot exceed 255.
Table 19. IGMP Tab
Parameter Definition