[c-nsp] Serial interface flapping/Automatic shutdown

Tassos Chatzithomaoglou achatz at forthnet.gr
Tue May 30 16:21:35 EDT 2006


You can use "carrier-delay x" to make the interface report the carrier lost after x secs.

Also have a look at event dampening on newer IOS:
http://www.cisco.com/en/US/products/sw/iosswrel/ps1829/products_feature_guide09186a00806994c7.html

--
Tassos

Wolfgang Roth wrote on 30/5/2006 11:10 μμ:
> Is there any possibility to automatically shutdown a flapping serial 
> interface, e.g. if it goes N times up and down in an interval of I seconds? 
> Also it would be nice if that interface could be automatically brought up 
> again after a second interval of J seconds.
> 
> I ask, because if an interface flaps rapidly (say every few seconds) and 
> you use a routing protocol like OSPF the load on the involved routers 
> increases drastic and the network becomes some kind of unstable.
> 
> We're running IOS 12.3 on 7200 series router.
> 
> Thank you!
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