I can second that. We actually did the wireshark and found that ifTableLastChange (or ifStackLastChange - I don't remember) changed with almost every polling interval but it should not. I think our networking guys opened a ticket with Cisco.
Cheers, Joern Joern Henrichs Senior System Engineer ISS Service Desk Remote Betrieb Computacenter AG & Co. oHG Services & Solutions Voltastraße 1, 60486 Frankfurt, Germany Tel.: +49 69 97779 342 Mobile: +49 173 2946155 Fax: +49 69 97779 110 Short-Dial: 22342 E-Mail: [email protected] WWW: www.computacenter.de > -----Ursprüngliche Nachricht----- > Von: John O'Mahony [mailto:[email protected]] > Gesendet: Freitag, 5. Februar 2010 12:26 > An: spectrum > Betreff: RE: [spectrum] Excessive Rate of Device Interface Reconfigurations > alarms > > Hi > We have also seen this with one of our customers. In our case the real cause > of > this looks likely to be a bug in the Cisco switches. It looks like this has > been > exposed by a change - between 8.x and 9.x - to the way Spectrum decides a > reconfig is needed. > > In version 9.x Spectrum looks for a change in the attributes ifNumber, > ifStackLastChange and ifTableLastChange to decide whether a reconfig is > needed. The switches where our client was experiencing excessive reconfigs > were showing continuous small changes in the ifStackLastChange and > ifTableLastChange attributes despite there being no change in the switch > config. > The client has now taken this to Cisco and has set Autmatically Reconfigure > Interfaces to false for these devices. > > This did not happen with the same devices on the client's 8.1 system prior to > upgrade. We have asked support is there a difference in the way a reconfig is > calculated in 8.x versus 9.x and haven't received a definitive response. We > suspect that 8.x does not use the ifStack and ifTable attributes to decide > whether > a reconfig is needed but only uses ifNumber. A quick Wireshark of the > communications between Spectrum and the Cisco devices would prove/disprove > this however we have not been able to do that yet. > > Regards, John > > -----Original Message----- > From: Jon Whitehouse [mailto:[email protected]] > Sent: 03 February 2010 13:47 > To: spectrum > Subject: RE: [spectrum] Excessive Rate of Device Interface Reconfigurations > alarms > > I got this too when I upgraded and have also opened up a case with support. I > was told to turn off the option on each of the devices for "Discovery After > Reconfigure". To manually do it on a single device go to the component details > information tab. Then under Reconfiguration set "Discovery After > Reconfigure" to > No. I know it's a cop-out fix but good enough for me for now. > > --- > Jon Whitehouse > Systems Engineer - IT, Server Support > MS 5221 > 1800 W. Center Street > Warsaw, IN 46580 > (574) 371-8684 > (574) 377-2829 (cell) > [email protected] > > > -----Original Message----- > > From: Cristi Mitrana [mailto:[email protected]] > > Sent: Wednesday, February 03, 2010 8:34 AM > > To: spectrum > > Subject: Re: [spectrum] Excessive Rate of Device Interface > > Reconfigurations alarms > > > > Curtis Kellogg wrote: > > > Hello Spectrum List, > > > > > > I upgraded our Spectrum on windows to 9.1.2 over the weekend and have > > > been receiving a lot of Minor Alarms for Excessive Rate of Device > > > Interface Reconfigurations. They are defined in the > > > Cisco_Router/EventDisp file for 6 interface reconfiguration is a 30 > > > minute window. I am getting these for Cisco Switches that have a lot > > of > > > end users connected to them. Before the upgrade we were not getting > > > these, so I believe they are new to 9.1.2. > > > > > > > Yes, I've seen this as well after the upgrade. Looks like a bug to me, > > I've already opened > > an issue, but so far got nothing. It might worth reporting it to > > support. > > > > regards, > > -- > > Cristi Mitrana > > > > --- > > To unsubscribe from spectrum, send email to [email protected] with the > > body: unsubscribe spectrum [email protected] > > --- > To unsubscribe from spectrum, send email to [email protected] with the body: > unsubscribe spectrum [email protected] > > --- > To unsubscribe from spectrum, send email to [email protected] with the body: > unsubscribe spectrum [email protected] ----------------------------------- Computacenter AG & Co. oHG, mit Sitz in Kerpen (Amtsgericht Köln HRA 18096) Vertretungsberechtigte Gesellschafter: Computacenter Aktiengesellschaft, mit Sitz in Köln (Amtsgericht Köln HRB 28384) Vorstand: Oliver Tuszik (Vorsitzender), Dr. Karsten Freihube, Hans-Georg Freitag, Frank Kottmann, Reiner Louis Aufsichtsrat: Michael Norris (Vorsitzender) Computacenter Management GmbH, mit Sitz in Köln (Amtsgericht Köln HRB 28284) Geschäftsführer: Ulrich Irnich, Jürgen Stauber Visit us on the Internet: http://www.computacenter.de Visit our Online-Shop: https://shop.computacenter.de This email is confidential. 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