Allied Telesis AT-S63 - Manual (Page 406)

Chapter 20: MLD Snooping
406 Section III: IGMP Snooping, MLD Snooping, and RRP Snooping
additional multicast packets out the port where the host node is
connected.
Multiple Host/Ports (Intermediate)
The Multi-Host setting is appropriate if there is more than one host
node connected to a switch port, such as when a port is connected to
an Ethernet hub to which multiple host nodes are connected. With this
setting selected the switch continues sending multicast packets out a
port even after it receives a leave request from a host node on the port.
This ensures that the remaining active host nodes on the port continue
to receive the multicast packets. Only after all the host nodes
connected to a switch port have transmitted leave requests or have
timed out does the switch stop sending multicast packets out the port.
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 MLD 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 host 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specified time interval, it assumes that the router is no longer active on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 MLD Multicast Groups
This parameter specifies the maximum number of MLD 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 where a multicast router is located.
You can let the switch determine this automatically by selecting Auto
Detect, the default setting, 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.