[nsp] GEIP+ performance?

[Steve Gibbard]

Thanks.  And if I go with GSRs instead, should I expect full line rate, or
something less?

-Steve

On Fri, 25 Jul 2003, Roldan, Brad wrote:

> Steve,
>
>    We've found that performance of the GEIP+ cards are hinged directly
> to the types of VIP cards installed in the chassis. Somewhat
> counter-intuitively, we've found that we can achieve much higher
> performance if traffic to/from a GEIP+ card is distributed across
> multiple VIP4-50 cards, instead of GEIP+ to GEIP+.
>
>    The features we use, which may contribute to the performance numbers
> are .1q encapsulation and Fast Etherchannel on the VIP4-50s.
>
>    With the above setup, you should be able to achieve close to 300 Mbps
> of bi-directional traffic (600 Mbps aggregate), with 0% packet loss
> using mixed packet sizes (IMIX). If you can tolerate a little packet
> loss, you can go up to 330 Mbps of bi-directional traffic. Anything
> above that point, and you'll see your 'ignore counters' increment like
> crazy.
>
>    I don't have our original test results handy, but I seem to recall
> that the best performance we could get at 0% packet loss with IMIX was
> in the neighborhood of 250Mbps bi-directional for GEIP+ to GEIP+
> traffic.
>
>    For what it's worth, we use the 128MB upgrade option on the GEIP+
> cards. You can also get better results if you assume a 2:1 traffic ratio
> (2 bytes into GEIP+ for every 1 byte out), instead of a 1:1 ratio.
>
> Regards,
>
> Brad
> --
> Covad Communications
> 3420 Central Expressway
> Santa Clara, CA 95051
> +1-408-616-6830
> broldan at covad.com
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Steve Gibbard
> Sent: Wednesday, July 23, 2003 6:31 PM
> To: cisco-nsp at puck.nether.net
> Subject: [nsp] GEIP+ performance?
>
>
> I'm looking for real-world performance information on the GEIP+.
>
> Cisco claims throughput for the non-+ version of the GEIP is 400 Mb/s,
> but
> we're seeing issues at around 150 Mb/s.  This appears consistent with
> the
> performance tests in the Cisco white paper at
> http://www.cisco.com/warp/public/cc/pd/ifaa/ifpz/ggethifpz/prodlit/geip_
> ds.pdf.
>
> For the GEIP+, I see that Cisco is claiming 800 Mb/s throughput, but I
> haven't been able to find any documentation on packets per second rates,
> and I'm wondering if we'll still end up limited to around 300 Mb/s if it
> really only doubles the performance of the GEIP.
>
> What have people seen in terms of GEIP+ performance with the ~350 byte
> average packet size I'm seeing here?
>
> Thanks,
> Steve
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