I don't think this is anything to do with SNMP version.
It may be caused by the device itself. I have noticed that *some* network gear does not reliably report interface speeds - indeed, sometimes the ifSpeed field is a user-settable variable that has not relation to the actual interface speed. This could be the case here. You might like to make sure you're using SNMPv2 on both ends (which you need to do for Gig interface in any case to get meaningful values). This might solve the problem. I can't remember the option to cfgmaker to force SNMPv2 off the top of my head so you'll have to RTFM for it. If all else fails, you can always edit the .cfg files and set the MaxBytes[] value to the appropriate amount. This is annoying though, particularly if the cfgmaker is run automatically. Steve I am running MRTG 2.15.1 on an OpenSuse 10.2 platform. I am using cfgmaker to create individual config files for all my monitored servers. Recently I noticed that on several boxes that should be reporting Bandwidth of One-gig, MRTG is only reporting 100Mb. I have confirmed using ethtool that the interface is configured for gig speeds, and this is corroborated by the Ethernet switch auto-negotiating at 1000Mb.
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