Optivity Switch Owner's Manual

Chapter 6 Using Multicast Manager 133
Using Optivity Switch Manager, Release 1.1.0.0
Receiver tab
The Receiver tab (Figure 60) provides information about IGMP group receivers.
Robustness Robust value (based on the network’s tendency to lose
data). This value, along with the query interval, is used to
determine the group membership timeouts. It should be
set to that of the multicast router in the network. If more
than one multicast router is within a VLAN and the robust
values are different, set the Passport switch to the highest
value. The range is 2 to 255. The default is 2.
QueryInterval(sec) In general, the time between queries sent to the host. this
value is used to determine the multicast group
membership timeouts. The real interval between queries
is still dependent on the multicast router within the VLAN.
Set this value to be the same as that of the multicast
routers in the VLAN. If there are multiple multicast routers
on the net, select the highest query interval value. The
query interval is in seconds (1 to 65535) with a default of
125 seconds.
MRouterPorts Ports that have been configured as Multicast Router
Ports. Such ports provide connectivity but do not have to
be directly attached to a multicast router so the multicast
data and group reports are forwarded to the router.
ActiveMRouter Active Multicast Router Ports are ports that provide
connectivity but do not have to be directly attached to a
multicast router. These ports include the Querier port and
all ports in the forwarding state that were configured by
the user, as well as those that were dynamically learned
using receiving queries.
ActiveQuerier IP address of the last querier (multicast router) of this
VLAN that was heard by the switch.
QuerierPort Port on which the LastQuerier is being heard.
MRouterExpiration Time remaining before the multicast router is aged out. If
the switch does not receive any queries before this time
expires, it flushes out all group memberships known to the
VLAN. The Query Max Response Interval (obtained from
the Queries received) is used as the timer resolution.
Table 39 General tab fields (continued)
Field Description