Allied Telesis AT-S63 - Manual (Page 238)

Chapter 14: IGMP Snooping
238 Section II: Advanced Features
When you select a value for this parameter, it is important to note
that the value you enter actually defines the approximate mid-
point of a range within which a timeout can occur. Consequently,
an actual timeout may occur earlier or later than the value that
you enter. The range is from 0.7 to 1.4 of your value. For example,
if you leave this parameter set to the default 260 seconds, a
timeout can occur from 182 seconds to 364 seconds. You may
need to take this into account when setting this parameter.
4 - Maximum Multicast Groups
This parameter specifies the maximum number of multicast
groups the switch learns. This parameter is useful with networks
that contain a large number of multicast groups. You can use the
parameter to prevent the switch’s MAC address table from filling
up with multicast addresses, leaving no room for dynamic or static
MAC addresses. The range is 1 to 255 groups. The default is 64
multicast groups.
5 - Multicast 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. To select Auto Detect, enter “0” (zero) for
this parameter. You can specify more than one port.
Note
A change to any parameter in this menu is immediately activated on
the switch.
Note
Selection 6, View Multicast Hosts List, is described in ”Displaying a
List of Host Nodes”, next. Selection 7, View Multicast Routers List, is
described in ”Displaying a List of Multicast Routers” on page 242.
4. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.
Your changes are activated immediately on the switch.