I ran into a similar situation in the past when the particular Cisco switches I was using did not support 64-bit counters. As a short-term solution, I put this required config into a separate config file and scheduled a dedicated mrtg process to run every minute. It worked very well and identified traffic levels in excess of 114Mbps (sorry I can't remember the peak value). A couple of points worth mentioning: - - this was straightforward mrtg (no rrd) - I called the mrtg process from a scheduled job every minute, not using RunAsDaemon or interval settings (although this may work just as well)
I have since upgraded the switches to ones with SNMPV2c support and I ran both the mrtg processes in parallel (SNMPv2 counters every 5 minutes and SNMPv1 counters every 1 minute) for a period of a few days proving that the resultant graphs and averages were pretty much identical. I haven't had the opportunity to migrate to rrdtool but this may also be a way forwards. HTH "Michael Markstaller" <[EMAIL PROTECTED]> To Sent by: <[EMAIL PROTECTED]> [EMAIL PROTECTED] cc ee.ethz.ch Subject [mrtg] MRTG to monitor 27/05/2003 11:54 Gigabit-ethernet with counter32 and interval: 1 Just a quick question, I have to monitor a 3Com Superstack 4900 GE-switch which seems to have no SNMP-v2c at all and so no 64Bit-counters ifHC*Octets. So far so bad, I understand the whole problem; when traffic hits 114 MBit, counters wrap etc.. A possible way out I thought of now is to run MRTG (with RRDtool for sure) more often with "Interval: 1" which should give me at least graphs up2 ~570Mbit. Am I right ? Anybody done this that way, is there something else to consider ? I created the RRD's with mrtg-2.9.29, are they capable to handle the high values by default or do I have to alter them (I'd find out how) I thought to create a separate mrtg instance only for these two switches to not tamper the other graphs. Just to make sure: I really don't want to make mrtg run with a higher resolution, I only want to monitor the GE-ports with 32bit-counters. another question (I know it was asked a thousand times, but only to enhance resolution which I don't want to): is it possible to set interval to .5 (30 seconds) to poll the counters even more often and be able to see the whole workaround this completely ? I read & tried everything possible now, maybe somebody can only acknowlegede "interval" helps me out. (or tell me it's impossible, then I'll go to 3Com and tell them to have a deeper look on rfc2233. Michael -----Original Message----- From: Michael Markstaller Sent: Tuesday, May 27, 2003 11:33 AM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: [mrtg] Re: Mrtg for monitoring CPU and disk space you should be a little more specific, what type of box are you talking about. then look on the mrtg-page and search the archives: http://www.google.de/search?num=100&hl=de&ie=ISO-8859-1&q=cpu+disk+%22+site%3Awww.ee.ethz.ch&meta= or search for hrStorage and hrProcessorload in case your box supports HOST-RESOURCE-MIB Michael -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Tuesday, May 27, 2003 10:29 AM To: [EMAIL PROTECTED] Subject: [mrtg] Mrtg for monitoring CPU and disk space Hi alls, I would like to know how to monitoring cpu and disk space because I have installaed mrtg but I see only the graph of eth0 and eth1. Probabily I must add something to the snmpd configuration. Could someone help me ? Thanks in advance. Fabrizio -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://www.ee.ethz.ch/~slist/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://www.ee.ethz.ch/~slist/lsg2.cgi