"2M today, 10M with no change in technology"? An informal survey.

Mikael Abrahamsson swmike at swm.pp.se
Tue Aug 28 05:35:15 UTC 2007

On Mon, 27 Aug 2007, Deepak Jain wrote:

> Where do the FIBs break on older 12000 series and M-series routers? (or 
> pick the *next* most popular piece of network equipment that is used in 
> full-routes scenarios).

On the 12000, I'd give the following observations on the state of the 
older linecards for DFZ routing:

GRP that can't handle 512 meg memory has been useless for quite some time.
GRP-B with 512 megs of ram seems ok for at least 6-12 more months.
PRP needs 1 gig of ram.
All LCs need at least 256 megs of route memory.
4GE engine3 LC needs 512 megs of route memory.
10x1GE Engine 4 LC needs 512 megs of route memory.
Engine2 LCs are starting to run out of forwarding resources, cisco states 
200k routes, but obviously they still work, but for how long?

Otoh the SIP-601 comes with 2 gigs of route memory, which is really nice. 
The 12000 with recent hardware will most likely last quite some time, but 
the hardware designed in the late 90ties is (not strangely) running out of 

So if you have old hardware, you need to monitor your memory and table 
utilization on a monthly basis.

Mikael Abrahamsson    email: swmike at swm.pp.se

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