Thanks for the ideas. Community string is actually redacted, but I guess I should've made that more obvious than mashing the keyboard :)
Agreed, my first thought was v1 but I am now specifically targetting 64bit counter OIDs and I've verified it is using SNMP v2 through debug options. Definitely sure the port is the same - low values are slightly different but the intervals are also slightly different (Cacti is running on 1 minute, MRTG is running on 10 minutes.) The MRTG version is super old - that was one of my first thoughts, I'm just somewhat reluctant to even touch it as it's running on an incredibly old version of Linux as well but I think that is my next plan. Not using a third party front end, it is a custom PHP script that calls 'rrdtool graph' directly. I will try rearranging the config file, thanks for that idea. On Tue, May 14, 2013 at 10:34 PM, Steve Shipway <[email protected]>wrote: > A few thoughts**** > > ** ** > > **1. **You’ve just told the world your SNMP community string. Oops. > **** > > **2. **It certainly looks a bit like an SNMPv1 issue, though that > would generally top off about 120Mbps. However the config seems to use v2 > correctly.**** > > **3. **Are you absolutely certain that both graphs relate to the > same port? Possibly there is some confusion in the settings?**** > > **4. **Look at the two graphs close up. Are they exactly the same > for low values, then lose it for high values? If so, maybe its using > SNMPv1 anyway. If not, maybe you’re graphing something different.**** > > **5. **Which version of MRTG do you have? Possibly an old one is > not handling things correctly. Get a copy of 2.17.x installed and see if > the problem goes away.**** > > **6. **There’s always the possibility that Cacti is getting it > wrong, so check there as well.**** > > **7. **Is it a bits/bytes issue? If Cacti is showing 8x the MRTG > value, maybe MRTG is showing in bytes. Though you have ‘options bits’.**** > > **8. **What frontend are you using for MRTG/RRD? Some, notably > Routers2.cgi in earlier versions, want the Target line to come first in the > stanza. Try rearranging them this way, maybe the Options line is getting > ignored and you’re viewing in bytes/sec.**** > > ** ** > > HTH**** > > ** ** > > Steve**** > > ** ** > ------------------------------ > > *Steve Shipway*** > > ITS Unix Services Design Lead**** > > University of Auckland, New Zealand**** > > Floor 1, 58 Symonds Street, Auckland**** > > *Phone: +64 (0)9 3737599 ext 86487* > > *DDI: +64 (0)9 923 6487* > > *Mobile: +64 (0)21 753 189* > > *Email: [email protected]* > > P Please consider the environment before printing this e-mail : 打印本 > 邮件，将减少一棵树存活的机会**** > > ** ** > > *From:* [email protected] [mailto: > [email protected]] *On Behalf Of *Simon > Westlake > *Sent:* Wednesday, 15 May 2013 2:26 p.m. > *To:* [email protected] > *Subject:* [mrtg] Strange MRTG problem**** > > ** ** > > Hello,**** > > ** ** > > It's been a long time since I used MRTG (I've been writing directly to > rrds for a long time now) but an old employer of mine asked me to > troubleshoot a legacy MRTG setup and I'm having a strange problem with it I > cannot decipher.**** > > ** ** > > I am graphing a port in two ways. One is in Cacti, one is with MRTG. Both > are using 64bit counters (I have even setup the MRTG configuration to > specifically use the HC OIDs rather than assuming they are being queried by > specifying :::::2)**** > > ** ** > > In Cacti, I get the correct value (approximately 700-800Mbps per second.) > In MRTG, it is never more than 190-200Mbps.**** > > ** ** > > My MRTG configuration looks like this:**** > > ** ** > > WorkDir:/var/www/mrtg**** > > Forks: 30**** > > Refresh: 300**** > > Interval: 5**** > > MaxAge: 999999999999999999999999**** > > SnmpOptions: retries => 1, timeout => 1**** > > LogFormat: rrdtool**** > > ** ** > > ** ** > > Options[DAS-c3229-bandwidth]: growright,bits,nolegend,nobanner,nopercent** > ** > > Directory[DAS-c3229-bandwidth]: DAS-c3229**** > > Target[DAS-c3229-bandwidth]: > 1.3.6.1.2.1.31.1.1.1.10.140&1.3.6.1.2.1.31.1.1.1.6.140:[email protected]: > ::::2**** > > Extension[DAS-c3229-bandwidth]: php**** > > Suppress[DAS-c3229-bandwidth]: y**** > > Title[DAS-c3229-bandwidth]: Bandwidth Utilization**** > > Maxbytes[DAS-c3229-bandwidth]: 200000000000000000**** > > AbsMax[DAS-c3229-bandwidth]: 200000000000000000**** > > ** ** > > I have tried tweaking a lot of things and I can't seem to figure out > what's going on. Any insight would be appreciated as I'm 2+ days into > troubleshooting this thing and it's driving me crazy. Thanks!**** > > -- > - Simon Westlake**** > -- - Simon Westlake [ digitalgunfire.com ] AIM: ShirowDG ICQ: 2227213 Voice: (414) 810-6392
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