DES-3226S Layer 2 Fast Ethernet Switch User’s Guide
IGMP Snooping Commands
201
config igmp_snooping querier
message intervals:
•
Group member interval—Amount of
time that must pass before a
multicast router decides there are no
more members of a group on a
network. This interval is calculated as
follows:
(robustness variable x
query interval) + (1 x query
response interval)
.
•
Other querier present interval—
Amount of time that must pass before
a multicast router decides that there
is no longer another multicast router
that is the querier. This interval is
calculated as follows:
(robustness
variable x query interval) +
(0.5 x query response
interval)
.
•
Last member query count—Number of
group-specific queries sent before the
router assumes there are no local
members of a group. The default
number is the value of the robustness
variable.
•
By default, the robustness variable is
set to 2. You might want to increase
this value if you expect a subnet to be
lossy.
last_member_query_interval <sec>
−
The
maximum amount of time between group-
specific query messages, including those sent
