[nsp] 7206vxr pps & mbit/s limits

[Burns, Keith]

Be careful going to an NSE1 to "improve performance".

The NSE1 is essentially an NPE-300 with a "co-processor" (an array of
parallel processors called the "toaster").

The "toaster" supports the acceleration of certain features, BUT if you turn
on a feature that is NOT accelerated, you get NPE-300 performance.

Much better bet is the NPE-G1, a vast improvement on the NPE-400.

Cheers
Keith.

Keith Burns
Principal Network Architect
ICG Telecommunications
IP Ph: 303-414-5385
Cell:   303-912-3777 

"The dogs may bark, but the caravan rolls on...."


> -----Original Message-----
> From: Hank Nussbacher [mailto:hank at att.net.il]
> Sent: Tuesday, October 28, 2003 12:55 AM
> To: jlewis at lewis.org; cisco-nsp at puck.nether.net
> Subject: Re: [nsp] 7206vxr pps & mbit/s limits
> 
> 
> At 07:33 PM 27-10-03 -0500, jlewis at lewis.org wrote:
> >I see there was a similar thread about a year ago...but now 
> I'm wondering
> >what I should reasonably expect from a 7206vxr NPE300.  I've got one
> >routing betweeen several FE's, doing OSPF, BGP, ISL, some 
> ACL's, policy
> >routing to block nachi pings.  CPU load is pretty constant around 50%
> >except for the bgp scanner spikes.
> >
> >We recently moved a FE transit connection to it, and that 
> seems to have
> >pushed it over (or at least a lot closer to) the edge.  If I 
> add up all
> >the 30s avg bps/pps, I get (at this moment) 125mbit/s and 
> 37kpps.  When we
> >moved that busy transit FE onto this router, we immediately started
> >getting fairly constant underrun errors on the interface and 
> output drops.
> >I was able to considerably reduce the output drops by increasing the
> >hold-queue, and this may have even reduced the frequency of 
> underruns, but
> >we still get them regularly.
> >
> >Previously, this transit FE was on a 7500 (RSP4, VIP2-50s) 
> that seemed
> >perfectly happy with the traffic.
> >
> >Is upgrading to a faster NPE (NPE400?) going to make much 
> difference, or
> >would we have to go to NSE1 or NPEG1 to see much improvement?  I'm
> >wondering if we ought to just go with another 7500...perhaps the
> >distributed architecture really does beat the 7206 and its single
> >processor.
> 
> NPE400 (32% CPU):
>    5 minute input rate 66578000 bits/sec, 14926 packets/sec
>    5 minute output rate 37219000 bits/sec, 15310 packets/sec
>    5 minute input rate 20485000 bits/sec, 12206 packets/sec
>    5 minute output rate 52021000 bits/sec, 11112 packets/sec
>    5 minute input rate 3323000 bits/sec, 798 packets/sec
>    5 minute output rate 1143000 bits/sec, 1504 packets/sec
> 
> -Hank
> 
> 
> >-------------------------------------------------------------
> ---------
> >  Jon Lewis *jlewis at lewis.org*|  I route
> >  Senior Network Engineer     |  therefore you are
> >  Atlantic Net                |
> >_________ http://www.lewis.org/~jlewis/pgp for PGP public 
> key_________
> >
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