[mrtg] Re: Problems with interfaces running at GigE speed

[Michiel Muhlenbaumer]

Hi,

I'm using mrtg-2.11.1. I'm mrtg-ing a few hosts (linux machines) with 
net-snmp 5.2.1.2 and compiled them with --mfd-rewrites, so the 64bit 
counters show up.

But still it looks like MRTG either doesnt use these or the 64bit 
counters in snmp aren't working correctly.

Greets,

Michiel Muhlenbaumer

Pavel Ruzicka wrote:
> Hi,
> 
> 
>>I'm using mrtg to monitor some servers with GigE connections to the
>>internet. All these servers are pushing 600-800mbit to the internet,
>>causing counter rollover in snmp.
>>
>>I've recompiled SNMP with --with-mfd-rewrites to enable 64-bit counters
>>in net-snmp. I'm running mrtg with :::::2 at every host in mrtg.cfg.
> 
> 
> MRTG probably doesn't use net-snmp tools. What version of MRTG you have?
> It's possible that, your device (what device you read?) doesn't support
> 64bit counters and MRTG doesn't read them.
> 
> 
>>The problem is that I still have problems with counter wrapping, also
>>with the ':::::2' option added.
>>
>>I'm running mrtg every minute.
> 
> 
> Running every 5 minutes is enough with 64bit counters.
> 
> 
>>Any comments to make this work?
> 
> 
> I measure traffic on STM-16 and Gigabit interfaces on Cisco routers and 
> switches without problems.
> 
> Best regards,
> 
> Pavel Ruzicka

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