[c-nsp] link flaps

[jack daniels]

but my local mux to router ethernet will nveer go down...so how will
dampening help in this case..

On Mon, Nov 29, 2010 at 11:02 AM, Oliver Boehmer (oboehmer)
<oboehmer at cisco.com> wrote:
>
>>
>> Router R1 --------------Ethernet
>> Cable-----MUX----------------MUX-----------Ethernet Cable-------Router
>> R2
>>
>> I have backup link but conbvergence takes time and packet drops. The
>> area is remote area where I have this link , so link flaps are quite
>> normal.
>> I was thinking If links flaps 3 or 4 times in say 1 min , I put the
>> link in BAD state and not use it .Instaead I use backup link.If
>> prinary link is ok for 1 hr. I again use it...
>>
>
> IP event dampening would be the feature of choice, and you could find
> settings to take down the link for routing after a few flaps per minute
> ("dampening 30 200 1800 120"), but the dampening algorithm wouldn't
> allow it to stay down for so long as an hour (unless the link continues
> to flap). With those settings, the link would come back up ~2 minutes
> after the flapping stops..
> If you need to keep it down for much longer, EEM scripting would be an
> alternative (I think a complex one, not an EEM expert)..
>
>        oli
>
>