Hi Everyone, I have an odd problem that I'm hoping someone can shed some light on.
I have MRTG 2.10.13 setup on an OpenBSD 3.7 machine. It polls my switch, a catalyst 2924, every 5 minutes. Data coming from my switch seems to be valid and agrees with what iptraf on my firewall says about current usage. The ethernet drop from my ISP comes into port 1 on the switch, and port 2 goes to the firewall. These ports are in their own vlan so that data from our network doesn't get comingled in. My ISP uses MRTG 2.9.29, I don't know what OS. They poll the port that the other end of my ethernet drop uses every 5 minutes. The problem is that the data I'm seeing and the data my ISP is seeing don't match up. The usage they're seeing is a lot higher than what I'm seeing, but the curve of the graph matches up pretty well. For example, looking at the weekly graph, with a 30 minute average, my copy of MRTG reports a peak of 2800.0k. Their copy of MRTG is reporting a peak in the same period of something around 23.0M. Comparing more data shows about the same ratio between my data and their data. I've been working with one of their network engineers and so far neither of us have been able to figure out where the problem lies. I'm currently working on getting them to let me monitor their switch directly and have them monitor my switch directly to make sure each switch is reporting the same data, but it's unclear as to whether they'll go for this. So, ignoring that it may an issue with either my switch or theirs, does anyone have any ideas as to where the problem may lie? A small difference I'd understand, but the data they're showing is consistantly 8-16x higher than what I show for the same period. I've appended my config and their config (properly sanitized) below. Thanks for any light you can shed on this issue. -Zach My Config: Target[10.0.x.x_2]: 2:[EMAIL PROTECTED]: SetEnv[10.0.x.x_2]: MRTG_INT_IP="" MRTG_INT_DESCR="FastEthernet0/1" MaxBytes[10.0.x.x_2]: 12500000 Title[10.0.x.x_2]: Traffic Analysis for 2 -- polestar-sac-sw1 PageTop[10.0.x.x_2]: <H1>Traffic Analysis for 2 -- polestar-sac-sw1</H1> *snip rest of html* Their Config: Target[Polestar_UDS2-234]: 458:[EMAIL PROTECTED]: SetEnv[Polestar_UDS2-234]: MRTG_INT_IP="" MRTG_INT_DESCR="FastEthernet8/10" Directory[Polestar_UDS2-234]: polestar MaxBytes[Polestar_UDS2-234]: 12500000 Title[Polestar_UDS2-234]: Traffic Analysis for Polestar FE8/10 UDS2-234 -- Sac2-UDS2 PageTop[Polestar_UDS2-234]: <H1>Traffic Analysis for Polestar FE8/10 *snip rest of html* -- Unsubscribe mailto:[EMAIL PROTECTED] 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
