Hi, TCP adjust-mss is the key, you were right. Thanks
Waseem ________________________________ From: Pete Lumbis <[email protected]> To: Nick Hilliard <[email protected]> Cc: Waseem <[email protected]>; NSP <[email protected]> Sent: Wednesday, October 5, 2011 4:15 PM Subject: Re: [c-nsp] CPU utilization for handling interrupt TCP Adjust-mss causes the 6k to punt the SYN to SW. I'm not sure if this will be process switched or CEF switched (interrupt), but I don't see a reason why we couldn't do it in software CEF. -Pete On Wed, Oct 5, 2011 at 8:20 AM, Nick Hilliard <[email protected]> wrote: On 05/10/2011 12:15, Waseem wrote: >> It is a regular internet traffic to port 80, from our customers, which >> should be CEF switched. > >Sounds like your router is punting all traffic. Are you seeing the >following errors in your logs? > >> %CFIB-SP-7-CFIB_EXCEPTION : FIB TCAM exception, Some entries will be >> software switched > >If this is the case, you need to drop the number of routes that the box is >handling, and then reboot the system. Once the FIB limits are exceeded on >this platform, rebooting is the only way to revert to hardware forwarding. > >Nick > >_______________________________________________ >cisco-nsp mailing list [email protected] >https://puck.nether.net/mailman/listinfo/cisco-nsp >archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
