[c-nsp] 2621 with cef

[Jon Lewis]

On Thu, 27 Oct 2005, Steve Snodgrass wrote:

> On Thu, Oct 27, 2005 at 03:43:12PM +0200, Horváth Szabolcs wrote:
>> Is it possible that 2621's max. throughput is around 60-65 mbps?
>> I tried various version from 12.0 to 12.2.
>>
>> Pps is around 1.5-2k. Cpu is on 99%/98% (five seconds average).
>
> You are lucky to get that much.  I have a 2621XM that I had to rate limit to
> 40 Mbps so that it wouldn't drop its OSPF neighbors.  Cisco specs the router
> at 1500 pps.
>
> http://www.cisco.com/warp/public/765/tools/quickreference/routerperformance.pdf

According to that chart, none of the above numbers make much sense.
Cisco specs the 2620/2621 at 1500pps if you're process switching...but 
under normal conditions, it should be cef switching most of the traffic, 
in which case they say it's good for 20kpps.  Even cef switched, they say 
it's only good for 12.8Mbps...which in the real world probably means it'll 
have a hard time when you get close to 6Mbps.

Your 2621XM is spec'd at 15.36Mbps.  Unless the pdf is incorrect, I find 
it pretty hard to believe you have one pushing 40Mbps.

----------------------------------------------------------------------
  Jon Lewis                   |  I route
  Senior Network Engineer     |  therefore you are
  Atlantic Net                | 
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