[c-nsp] Sup32 TCAM limit

[Phil Bedard]

Like you said, the limit is around 250k routes.  The box will through  
a FIB EXCEPTION when it reaches that limit.  It will remove the  
shortest-match prefixes from the TCAM and install a default route with  
a PUNT adjacency, which punts traffic to the MSFC.  You don't really  
want to software switch anything through the SUP32...

I don't know anyone that uses the SUP32 to carry a full Internet table.

Phil

On Jun 26, 2008, at 3:48 AM, Gregoire Huet wrote:

> Hello
>
> Reading the previous threads on this topic, I have understood that  
> the TCAM
> size would limit the number of routes on the Sup32 supervisor blade  
> to 249k.
>
> What I do not understand is what would happen to the routes being  
> inserted
> above this limit. Would such routes be 'soft' routed ? Is there also  
> a treshold for
>
> I would appreciate to know your experience with this blade and the  
> increasing
> number of public IPv4 routes.
>
> Best regards
>
> Greg
>
>
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