[c-nsp] RSP16 drop-in for RSP4?

[Bruce Pinsky]

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Bill Wichers wrote:
>> On Tue, Sep 19, 2006 at 03:13:34PM -0500, Pete Templin wrote:
>>> We're looking at deploying some RSP16s to replace RSP4s that are running
>>> low on RAM (obviously).  We're running 12.0(27)S5 on all of our RSP4s.
>>> Is the RSP16 a drop-in replacement for the RSP4s, or are there any
>>> feature, IOS, or other limitations we should plan for?
> 
> Just a slightly related question: about how many feeds are you able to
> squeeze into an RSP4 w/ 256MB? Right now I have 1 full view and a partial
> (filtered from another of our routers) view on one router and run around
> 182MB (setup is PEER1 -- core1 -- core2 -- PEER2). We're planning on
> adding another peer to one of the routers
> (setup would then be PEER1 -- core1 -- core2 -- PEER2
>                                          |-- PEER3 )
> 
> Think that would fit in the 256MB on the core2 router? We're trying to buy
> some time until the coming year when all of our 7500 series (except one
> doing T1 aggregation) will be replacted with 12000 series gear and some
> 6500's.
> 

I know a customer with 2 feeds (plus their internal deaggs) that total
210K+ routes that are in 256MB on an RSP4.  The total usage for the routes
is about 170MB and with IOS image loaded and other data structures, they
are at about 230MB total.  Leaves them with less than 10% headroom which
would concern me for convergence events and potential memory frag issues.

Suffice to say, it will fit, but I'd call it "unhealthy".

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

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