North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Router too busy???
What was the process that was eating the CPU ? ---Mike At 07:29 PM 4/1/2003 -0500, k. scott bethke wrote: Wow thought I was alone in the world on that one. I dont run a web server on my VXR but telnet and ssh did indeed go away. this was after about 250 days of uptime. I had been very happy with this version of IOS. I was able to access the router OOB on the console port so it wasnt too urgent, and much like you guys a reboot fixed everything. I can swear in a court of law that everything else seemed to work fine (Save the normal cef bugs and general other IOS Roulette thingys) c7200-ik2s-mz.121-5.T10.bin -Scotty ----- Original Message ----- From: "Dan Armstrong" <[email protected]> To: "Mark J. Scheller" <[email protected]>; <[email protected]> Sent: Tuesday, April 01, 2003 2:05 PM Subject: Re: Router too busy??? > > We had what I would say is exactly the same problem last Thursday around 3:00am. > The traffic lights on the router were pegged solid as usual, so it appeard to be > up and running, but not really passing any useful traffic. Telnetting to it was > pretty much useless, although it did glimmer to work for a minute but not enough > to get in and see what was going on. It did not reload itself. We power cycled > it, and it was fine. > > Running c7200-jk9o3s-mz.122-8.T5.bin > > Dan. > > > "Mark J. Scheller" wrote: > > > This last Saturday (29 Mar 2003), about 4pm Eastern time my router -- for lack > > of a better term -- wigged out. I was able to ping to & through it, however > > any attempt to get a TCP connection (specifically ssh and http) was almost > > immediately terminated. I think DNS was working fine, which would hint that > > UDP was getting through as well, but I won't swear to that in court. > > > > After convincing someone to drive to its location and do a power cycle, it > > rebooted happily and has run fine since. My mrtg graphs show that the CPU was > > pegged at 100% during the time it was acting up; memory was fine; traffic was > > (not surprisingly) very low -- and no spike prior to the CPU getting pegged. > > > > I've been running this version of IOS since it was released as a response to > > the flaw found in SNMP.... and the router has been rock solid! CPU is > > normally 15-20% with occasional spikes, but never for long. Memory erodes > > slowly, but never dropping below 20MB. > > > > Has anyone seen anything like this before? Basically, I'm wondering whether > > this may be an IOS bug or whether I may have hardware on its way out or > > whether this was some kind of new crafty DoS attack. > > > > TIA! > > > > Mark J. Scheller ([email protected]) > > -------------------------------------------------------------------- Mike Tancsa, tel +1 519 651 3400 Sentex Communications, [email protected] Providing Internet since 1994 www.sentex.net Cambridge, Ontario Canada www.sentex.net/mike
|