[f-nsp] Anyone using ip net-aggregate with full BGP routes

[Brent Van Dussen]

Yes, net-agg will help with CAM depletion and subsequent route-cache 
thrashing issues that follow.  The only thing I have seen that can limit 
net-aggs effectiveness is as follows:

- any routes in a specific /14 that have different next-hops will cause 
net-agg ineligibility for the entire /14.  Not really an issue unless you 
have directly connected routes in bunches and bunches of different /14's.

The nachi worm, which seems to have stopped about two weeks ago is another 
thing that will suck up all your route-cache but the 7.5 codetrain that's 
been in production for a while now has some trick new route-cache cleanup 
algorithms that seem to keep everything in check fairly well without eating 
up too much of the CPU.

This is all on Ironcore and M4 management modules.

Happy Networking,
-Brent


At 01:30 PM 1/20/2004, Devon wrote:
>All:
>
>I am curious to know if anyone is using ip net-aggregate on their
>BigIron routers with full BGP routes. Does it help with CAM issues at
>all? Any problems? IronCore or JetCore modules? If you do use it and have 
>had success with it, what version of code did you use?
>
>Thanks for any feedback!
>
>Devon
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