Hi Gianluca, Thanks for your information. (sorry the delay between one message and other, out of office) I think this may be a central point of the instabilities we are observing on 7600. I am trying to understand why ""mls rate-limit unicast ip icmp unreachable..." help in your case.
Please if you have time let me know: -Did you use commands to verify mistral asic drops? -Is the traffic punted to RP data traffic? -Are you using logging on Access Lists? Tks, Alaerte -----Original Message----- From: ext hjan [mailto:[EMAIL PROTECTED] Sent: Thursday, June 14, 2007 7:04 AM To: Vidali Alaerte (NSN - BR/Rio de Janeiro); [email protected] Subject: Re: [c-nsp] HSRP Flapping Due to CPU Spikes [EMAIL PROTECTED] ha scritto: > Hi Gianluca, > > Did you have a clue why does rate-limit solve the problem? In my case it is a combination of multiple factor, network topolgy and routing/qos design, however with mls rate-limit unicast ip icmp unreachable acl-drop 0 you force the SIP601-LC to doesn't punt unreachable packet to SUP-720 for processing, so you can't overwhelm the CPU. In my case for a short time after the up/down on tenge the cpu was overwhelmed and drop on mistral asic occours, what you drop is random and in my case involved eigrp. A sniff of the pachet punted to RP helped me a lot :) : monitor session 1 source interface gx/y monitor session 1 destination interface gx/y remote command switch test monitor add 1 rp-inband tx Regards, Gianluca _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
