Re: Graph shows unreal drop in traffic

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Re: Graph shows unreal drop in traffic
	2007-01-16 09:21:56
Is your utilization around 110 Mbps? If so, you're probably hitting the limits of the 32 bit counters, and they are wrapping. This can usually be resolved by using the 64 bit (snmp v2) counters, if your device supports it. Search for SNMPv2c: http://oss.oetiker.ch/mrtg/doc/mrtg-reference.en.html Erik -----Original Message----- From: mrtg-bouncelist.ee.ethz.ch [mailto:mrtg-bouncelist.ee.ethz.ch] On Behalf Of Riedel, Rayen Sent: Tuesday, January 16, 2007 7:08 AM To: mrtglist.ee.ethz.ch Subject: [mrtg] Graph shows unreal drop in traffic Hello, We are having a very strange problem. Sometimes we are getting a drop in traffic in the mrtg graphs. But when we look on the router itself, there is no drop. Does anyone knows something about this problem? Thank you. Regards, Rayen -- Unsubscribe mailto:mrtg-requestlist.ee.ethz.ch?subject=unsubscribe Archive http://lists.ee.ethz.ch/ mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz .ch/lsg2.cgi

Re: Graph shows unreal drop in traffic
	2007-01-16 09:25:59
Erik, Thank you. Duane Perry also suggested the 64-bit counters. That's exactly what's happening! I just made the changes. -----Original Message----- From: mrtg-bouncelist.ee.ethz.ch [mailto:mrtg-bouncelist.ee.ethz.ch] On Behalf Of Barber, Erik A. Sent: Tuesday, January 16, 2007 11:22 To: mrtglist.ee.ethz.ch Subject: [mrtg] Re: Graph shows unreal drop in traffic Is your utilization around 110 Mbps? If so, you're probably hitting the limits of the 32 bit counters, and they are wrapping. This can usually be resolved by using the 64 bit (snmp v2) counters, if your device supports it. Search for SNMPv2c: http://oss.oetiker.ch/mrtg/doc/mrtg-reference.en.html Erik -----Original Message----- From: mrtg-bouncelist.ee.ethz.ch [mailto:mrtg-bouncelist.ee.ethz.ch] On Behalf Of Riedel, Rayen Sent: Tuesday, January 16, 2007 7:08 AM To: mrtglist.ee.ethz.ch Subject: [mrtg] Graph shows unreal drop in traffic Hello, We are having a very strange problem. Sometimes we are getting a drop in traffic in the mrtg graphs. But when we look on the router itself, there is no drop. Does anyone knows something about this problem? Thank you. Regards, Rayen -- Unsubscribe mailto:mrtg-requestlist.ee.ethz.ch?subject=unsubscribe Archive http://lists.ee.ethz.ch/ mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz .ch/lsg2.cgi -- Unsubscribe mailto:mrtg-requestlist.ee.ethz.ch?subject=unsubscribe Archive http://lists.ee.ethz.ch/ mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz .ch/lsg2.cgi

Re: Graph shows unreal drop in traffic
	2007-01-16 11:36:34
...and if your switch does not have 64-bit counters, you can increase your polling frequency. I am currently running mrtg every three minutes against a particular switch with which I was having this problem, and I am now getting very accurate data without artificial drops. No configuration changes to mrtg are needed - you just grab data more frequently to avoid the wrap-around problem. Ed At 07:21 AM 1/16/2007, Barber, Erik A. wrote: >Is your utilization around 110 Mbps? If so, you're probably hitting the >limits of the 32 bit counters, and they are wrapping. This can usually >be resolved by using the 64 bit (snmp v2) counters, if your device >supports it. > >Search for SNMPv2c: >http://oss.oetiker.ch/mrtg/doc/mrtg-reference.en.html > >Erik > >-----Original Message----- >From: mrtg-bouncelist.ee.ethz.ch [mailto:mrtg-bouncelist.ee.ethz.ch] >On Behalf Of Riedel, Rayen >Sent: Tuesday, January 16, 2007 7:08 AM >To: mrtglist.ee.ethz.ch >Subject: [mrtg] Graph shows unreal drop in traffic > >Hello, > > >We are having a very strange problem. > >Sometimes we are getting a drop in traffic in the mrtg graphs. But when >we look on the router itself, there is no drop. > >Does anyone knows something about this problem? > >Thank you. > >Regards, > >Rayen > >-- >Unsubscribe mailto:mrtg-requestlist.ee.ethz.ch?subject=unsubscribe >Archive http://lists.ee.ethz.ch/ mrtg >FAQ http://faq.mrtg.org Homepage http://www.mrtg.org >WebAdmin http://lists.ee.ethz .ch/lsg2.cgi ============================================================ === ::::::::::::: PREMIUM COLOCATION SERVICES ::::::::::::: ============================================================ === New Media LLC infoservercolocation.ws 11630 Fair Oaks Blvd., #300 http://www.servercoloc ation.ws Fair Oaks, CA 95628 (916) 961-0446 (866) 519-4680 Toll-Free (916) 961-0447 Fax ============================================================ === -- Unsubscribe mailto:mrtg-requestlist.ee.ethz.ch?subject=unsubscribe Archive http://lists.ee.ethz.ch/ mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz .ch/lsg2.cgi

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