Allied Telesis AR400 - Manual (Page 82)

Page 82 | AlliedWare™ OS How To Note: IGMP
Configurable IGMP timers and counters > Default Timeout Interval
Earlier
software
versions
With software versions earlier than 281-03 and 2.9.1, you need to manually calculate and
change the Default Timeout Interval if you change any of the Robustness Variable, the
LMQC, the Default Query Interval, or the Query Response Interval. Simply use the formula
Default Timeout Interval =
(Robustness Variable * Default Query Interval)
+ one Query Response Interval in seconds
Note that the Query Response Interval is in seconds in this formula, instead of tenths of
seconds as displayed in the output of the command show ip igmp.
For example, if you set a Default Query Interval of 200 seconds (and otherwise have default
settings), you also need to set the Default Timeout Interval to:
Default Timeout Interval = 2 * 200 + 10 = 410 seconds
Manager Switch 1> set ip igmp queryinterval=200
Info (1005003): Operation successful.
Manager Switch 1> set ip igmp timeout=410
Info (1005003): Operation successful.
Manager Switch 1> show ip igmp
IGMP Protocol
------------------------------------------------------------------------
Status ........................... Enabled
Default Query Interval ........... 200 secs
Default Timeout Interval ......... 410 secs
Last Member Query Interval ....... 10 (1/10secs)
Last Member Query Count .......... 2
Robustness Variable .............. 2
Query Response Interval .......... 100 (1/10secs)
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