[AusNOG] back of envelope sizing calculations

Craig Askings craig at askings.com.au
Thu Mar 5 15:28:41 EST 2009


I suspect many an ISP that started with a single 7200 and a switch, still
has it humming it away in their network years (and many expansions) later.
It just slowly gets pushed further to the edge over time.

Craig.

On Wed, March 4, 2009 11:20 pm, Matthew Moyle-Croft wrote:
> Skeeve's recommendation is a good one:
>
> 7206VXR-NPE-G1s are the swiss army knife - well debugged, well
> understood, easy to obtain parts new and after market and will be
> supported for a long time to come and easily handle full BGP tables.
>
> Even though they're no longer something we use in our core they are
> now excellent PE routers for terminating customer sessions or smaller
> LNSes etc.  We've got a frightening number still humming away and
> unlikely to be replaced.  Because of this Cisco are unlikely to EOL
> them for a LONG time to come (think of the ROI of that platform for
> them).
>
> (We've got many dozens - I wouldn't want to try and count - it'd take
> too long).
>
> The news G2s are nice as they have an extra GE port and much faster
> VPN BUT remember they need SFPs (SFP slots only for 2 of the ports).
>
> MMC
>





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