Allied Telesis AT-S63 - Manual (Page 396)

Chapter 19: IGMP Snooping
396 Section III: IGMP Snooping, MLD Snooping, and RRP Snooping
If a switch has a mixture of host nodes, that is, some connected
directly to the switch and others through an Ethernet hub, you should
select the Multi-Host Port (Intermediate) selection.
3 - Host/Router Timeout Interval
Specifies the time period in seconds at which the switch determines
that a host node has become inactive. 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 timer never times
out, and the timeout interval is essentially disabled.
This parameter also specifies the time interval used by the switch in
determining whether a multicast router is still active. The switch makes
the determination by watching for queries from the router. If the switch
does not detect any queries from a multicast router during the
specified time interval, it assumes that the router is no longer active on
the port.
4 - Maximum IGMP Multicast Groups
This parameter specifies the maximum number of IGMP multicast
groups the switch can learn. This parameter is useful with networks
that contain a large number of multicast groups. The range is 0 to 256
groups. The default is 64 multicast groups.
Note
The combined number of multicast address groups for IGMP and
MLD snooping cannot exceed 256.
5 - Router Port(s)
Specifies the port on the switch to which a multicast router is detected.
You can let the switch determine this automatically by selecting Auto
Detect, or you can specify the port yourself by entering a port number.
You can specify more than one port. To specify all ports, enter ALL. To
specify no ports, enter NONE, To select Auto Detect, enter AUTO.
Note
A change to any parameter in this menu is immediately activated on
the switch.
Note
Selection 6, View IGMP Multicast Hosts List, is described in
“Displaying a List of Host Nodes” on page 398. Selection 7, View
IGMP Multicast Routers List, is described in “Displaying a List of
Multicast Routers” on page 400.
4. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.