3Com WX4400 Reference Manual page 224

224 C 6: C
HAPTER ONFIGURING
WX S P
YSTEM ARAMETERS
5 In the Version list, select Version 1 or Version 2 of IGMP.
6 If IGMP queriers are not on the subnet (for example, multicast routers),
select Querier Enabled.
3Com recommends that you use the pseudo-querier only when the VLAN
contains local multicast traffic that is not routed.
7 In the Query Interval box, specify the interval (1 to 65,535 seconds) at
which the WX switch sends general IGMP queries on behalf of multicast
routers to advertise multicast groups. The default interval is 125 seconds.
8 In the Other Querier Present Interval box, specify how long (1 to 65,535
seconds) the WX switch waits for a general query to arrive before making
itself the querier. The default interval is 255 seconds.
9 In the Query Response Interval box, specify how long (1 to 65,535 tenths
of a second) a device can take to respond to an IGMP query. The default
interval is 100 tenths of a second (10 seconds).
10 In the Last Member Query Interval box, specify how long (1 to 65,535
tenths of a second) the WX switch waits for a response to a group query,
after receiving a leave message for that group, before removing the
group. The default value is 10 tenths of a second (1 second).
11 In the Robustness Value box, specify the robustness value (2 to 255),
which sets IGMP timers to adjust to the amount of traffic loss on the
network. Set the robustness value higher to adjust for more traffic loss.
The default is 2.
12 To enable proxy reporting, which summarizes collected station IGMP
reports, select Proxy Report.
13 To enable multicast router solicitation, which allows the WX to discover
multicast routers on the subnet, select Multicast Router Solicitation.
14 In the Solicitation Interval box, specify the interval (1 to 65,535 seconds)
between multicast router solicitations by a WX. The default interval is
30 seconds.
15 Click OK.
Configuring Static Multicast Ports
A WX learns about multicast routers and receivers from multicast traffic
received from those devices. When the WX receives traffic from a
multicast router or receiver, the WX adds the port that received the traffic
as a multicast router or receiver port. The WX forwards traffic to multicast
routers only on the multicast router ports and forwards traffic to
multicast receivers only on the multicast receiver ports.