[c-nsp] cisco 3560 layer3 performance

[Brian Turnbow]

Check out this thread
http://puck.nether.net/pipermail/cisco-nsp/2007-May/040374.html
I had a similar issue with a 3750, the cause was "redirected" traffic 
Even though ip redirects were disabled on the vlan interface they were being punted to the cpu and then dropped.
Try a 
3750E-Jenner#sh controller cpu-interface  | i icmp
icmp              1886230815 0          0          0          0
3750E-Jenner#sh controller cpu-interface  | i icmp
icmp              1886236301 0          0          0          0
3750E-Jenner#sh controller cpu-interface  | i icmp
icmp              1886239093 0          0          0          0
To see if thet are increasing.
The only way I was able to resolve this was by moving the traffic so that it was routed between two seperate interfaces.

Regards
Brian
 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Mike Louis
Sent: martedì 22 gennaio 2008 4.53
To: Mark Kent; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] cisco 3560 layer3 performance

Are both models the WS-C3560G-48TS-S version?

The first device you mentioned, is it running layer 2 only, into the L2 access switchport and then out to the L2 trunk?


________________________________________
From: cisco-nsp-bounces at puck.nether.net [cisco-nsp-bounces at puck.nether.net] On Behalf Of Mark Kent [mark at noc.mainstreet.net]
Sent: Monday, January 21, 2008 10:31 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] cisco 3560 layer3 performance

Hello,

I've got a cisco 3560 (WS-C3560G-48TS-S) pulling in
(80Mbs, 6500pps) on one switch port, and sending it
out a trunk... cpu load is 5%.

Another cisco 3560, pulling in that same traffic on a trunk and
sending it out a layer3 point-to-point gigE is running at 70 to 80%
(cpu hog is "IP Input").

In fact, the cpu load is roughly the same as the Mbs load.  50Mbs = 50%.

Now, I know it's a small switch in the cisco line.
But wouldn't we expect it to do a fair bit better than this?
It looks like it will crap out at 100Mbs of layer3 traffic.

Thanks,
-mark
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