Igmp Snooping Setting; Igmp Global Setting - TRENDnet TEG-160WS User Manual

IGMP Snooping Setting

Find that there are two items, including IGMP Global Setting and
IGMP VLAN Setting in Advanced menu.

IGMP Global Setting

With Internet Group Management Protocol (IGMP) snooping, the
Web-Smart Switch can make intelligent multicast forwarding
decisions by examining the contents of each frame's Layer 2 MAC
header. IGMP snooping can help reduce cluttered traffic on the LAN.
With IGMP snooping enabled globally, the Web-Smart Switch will
forward IP multicast traffic only to connections that have group
members attached.
IGMP Global Setting
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IGMP Snooping: Enable or Disable the IGMP Snooping function on
the Web Smart Switch.
Querier State: Enable or Disable the Querier State of IGMP
Snooping.
Query Interval (60-600 sec): The Query Interval is the interval
between General Queries sent. By adjusting the Query Interval, the
number of IGMP messages can increase or decrease; larger values
cause IGMP Queries to be sent less often. Default is 125 seconds.
Max Response Time (10-25 sec): The Max Response Time specifies
the maximum allowed time before sending a responding report.
Adjusting this setting effects the "leave latency", or the time between
the moment the last host leaves a group and when the routing protocol
is notified that there are no more members. It also allows adjustments
for controlling the frequency of IGMP traffic on a subnet. Default is
10 seconds.
Robustness Variable (1-255): The Robustness Variable allows
adjustment for the expected packet loss on a subnet. If a subnet is
expected to be lousy, the Robustness Variable may be increased. The
Robustness Variable cannot be set zero, and SHOULD NOT be one.
Default is 2 times.
Last Member Query Interval (1-25 sec): The Last Member Query
Interval is the Max Response Time inserted into Group-Specific
Queries sent in response to Leave Group messages, and is also the
amount of time between Group-Specific Query messages. This value
may be adjusted to modify the "leave latency" of the network. A
reduced value results in reduced time to detect the loss of the last
member of a group. Default is 1 second.
Host Timeout (130-1225 sec): This is the interval after which a learnt
host port entry will be purged. For each host port learnt, a
'PortPurgeTimer' runs for 'HostPortPurgeInterval'. This timer will be
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