igmpSnoopRobustness

This enables IGMP tuning on a lossy network if a switch is the
querier. On such a network it may be increased. It is set stack-wide.
The default value is 1.  The range is 1 to 2. 
          
There could be a Low(1) or High(2) setting.
          
It is used to derive a timeout interval. If no IGMP v2 queries
are heard on this VLAN within this timeout interval, the local
switch will take over the querier role in the VLAN, assuming the
switch has no router ports:
  Other Switch Querier Present Interval =
  (Robustness x General Query Interval) +
  1/2(General Max Query-Response Interval) = 65 seconds by default
The Robustness is also used to derive another interval. The amount
of time that must pass before the querying switch decides that there
are no more hosts listening to a particular multicast in seconds:
  Group Membership Interval =
  (Robustness x General Query Interval) +
  General Max Query-Response Interval = 70 seconds by default.

MIB

A3COM0073IGMP-SNOOP

OID

.1.3.6.1.4.1.43.10.37.1.2

Type

scalar

Access

readwrite

Status

mandatory

Parent

igmpSnoop