Alex Thanks for your comments. I'm running mrtg on a Windows 2000 server (not my preference!) so I thought I could use the SNMP_Session.pm and BER.pm perl modultes that mrtg itself uses to do the snmp querying - I assume it's not to hard to figure out.
Re your last comment, how do I differentiate between a counter wrap and a reset ( - check the uptime?) Cheers Derek -----Original Message----- From: Alex van den Bogaerdt [mailto:[EMAIL PROTECTED] Sent: Tuesday, 7 October 2003 5:38 PM To: [EMAIL PROTECTED] Subject: [mrtg] Re: Cumulative graphing issue using "gauge" option - data wrap s after hitting 2^32 Bytes ... On Tue, Oct 07, 2003 at 02:36:39PM +1000, [EMAIL PROTECTED] wrote: > Dear all > I am trying to graph the cumulative usage im megabytes of the ports from our > routers to our isps. So far my graphs are quite good except that the OIDs in > question that I am monitoring seem to wrap (go back to zero) after they get > to around 4000000000 bytes (2 ^ 32 bytes). > > I was thinking that I could write a script to tweak the data that is stored > in the .log file to somehow recognise that the counter has wrapped and > simply process the .log data so that the data continues incrementing instead > of going back to zero. Alternatively: write your own script that queries the device, handles any overflow (counterwrap), and returns the difference to MRTG. MRTG needs to call this script using the external program; it needs to process the numbers as ABSOLUTE. Make sure your program knows when MRTG failed to update its log, and make sure your program knows when a counter was reset rather than wrapped. HTH Alex -- http://www.googlism.com/index.htm?ism=alex+van+den+bogaerdt&type=1 -- 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 ****************************************************************************** This email is intended for the use of the addressee only. If you receive this email in error, please delete it immediately. This email may contain information which is confidential and/or legally privileged. You must not use or disclose the contents of this email, or add the sender's email address to any database, list or mailing list unless you are expressly authorised to do so. The statements or views expressed in this email are those of the individual sender and are not those of Australian Associated Press Pty Ltd (AAP). These statements are not binding on AAP, except where the sender expressly and with authority, states them to be. AAP is unable to review the contents of all the email on its system. To the extent permitted by law, AAP disclaims all liability for any loss or damage caused by the contents of this email. ****************************************************************************** -- 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
