[c-nsp] RFC4090 and Implementation in Cisco

[Bruce Pinsky]

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Oliver Boehmer (oboehmer) wrote:
...snip...snip...
> Bruce:
> 
>> Based on the supported protocols list at:
>>
> http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft
> /120limit/120s/120s22/s_ipevdp.htm
>> I would say that MPLS/TE is not supported.  I would think there is a
>> need for some RSVP hooks in that scenario.
> 
> Not sure there is. If IP event dampening holds the lineprotocol down
> (i.e. when the penalty accumulated is too high), ISIS/OSPF will not get
> notified, so the headend will not reoptimize (if it is configured to do
> so). 
> 

Therein lies the rub.  It is not interface dampening but rather IP event
dampening.  So the line protocol of the interface is not held down but
rather the routing protocols are notified so that *they* can consider the
interface down for the purposes of adjacency formation, route
advertisement, and forwarding.  That's why there is a supported protocol list.

- --
=========
bep

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