Saturday, January 22, 2011

Selective Packet Discard

Well I can officially add this hidden ios feature to my "bag of things I will probably not ever use in real life" tricks.  It actually serves a cool function to prioritize the "important" router traffic within the input queues on an interface.  Control plane traffic such as IP prec 6, IGP traffic, etc...can be placed in additional priority headrooms that will be serviced first over the regular input queue during times of congestion.  Here are some Cisco links on it:

Doc 1
Doc 2

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