call spike

Answered Question
Mar 20th, 2008
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Hi,


I would like to config the router with this command. the setting is that it supports 10 call per second. how to set it?


rdgs


Correct Answer by Joe Clarke about 9 years 5 days ago

Correct, you need 10 calls in the window for the threshold to fire. Calls above the threshold will be dropped. The threshold is configurable. If you want to allow more calls in the threshold, then increase the number from 10.

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Joe Clarke Thu, 03/20/2008 - 10:51
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See http://www.cisco.com/en/US/docs/ios/12_3t/voice/command/reference/vrht_c3_ps5207_TSD_Products_Command_Reference_Chapter.html#wp1182322 for how to configure this command, and when this command was introduced.


For a threshold of 10 calls, you could do:


call spike 10


This would assume 5 steps with 200 ms per step for a window size of 1000 ms or 1 second. Therefore, the call dropping will kick in once the threshold of 10 calls per second has been exceeded.

anitachoi3 Fri, 03/21/2008 - 01:55
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Hi,


I have some questions if I config


call spike 10 (10 call per second)


if 9 incoming calls are in the first 100ms and then there is no call after next 900ms. cisco treats that it is under threshold.


is it correct?


If 11 incoming calls are in the first 100 ms, it hits the threshold. what cisco does it?


Does it block all incoming calls? (from 11th, 12th,..... call) is it configurable?


rdgs










Correct Answer
Joe Clarke Fri, 03/21/2008 - 10:35
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Correct, you need 10 calls in the window for the threshold to fire. Calls above the threshold will be dropped. The threshold is configurable. If you want to allow more calls in the threshold, then increase the number from 10.

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