[rrd-developers] Re: Counter limitation

[Weidlich, Bob]

Anyone know if Cisco routers support 64 bit counters for
ifInOctet and ifOutOctet data, and, if so, what the OIDs are?

We have a bunch of 155 Mpbs interfaces on Cisco 7xxx series
routers that I'm hitting every
2 minutes to avoid counter rollover, and I'll like to back down
to 15 minute polling.

Thanks.

Bob Weidlich
Road Runner
Herndon, VA  USA

> -----Original Message-----
> From: rrd-developers-bounce at list.ee.ethz.ch
> [mailto:rrd-developers-bounce at list.ee.ethz.ch]On Behalf Of Tobias
> Oetiker
> Sent: Monday, October 25, 1999 2:47 AM
> To: Austin Oh
> Cc: rrd-developers at list.ee.ethz.ch
> Subject: [rrd-developers] Re: Counter limitation
> 
> 
> Today you sent me mail regarding [rrd-developers] Counter limitation:
> 
> *> Dear Developers,
> *> 
> *> I have adopted a RRD tool with mrtg.
> *> But, i notice that i can't see actual utilization
> *> when the utilization of link is over about 120Mbps.
> *> 
> *> We use the Cisco router with high bandwidth link,
> *> 155Mbps ATM, FastEtherChannel, etc.
> *> 
> *> In my opinion, the problems are our router which uses
> *> the 32bit counter.
> *> Therefore, i have modified some code of mrtg and
> *> decreases the interval to 1 minute.
> *> It' looks fine. However, this is not the solutions because of
> *> 32bit counter.
> *> 
> *> Question
> *> i) How to use a MRTG or RRD when physical utilization is over 120Mbps ?
> *>    How to see the utilization ?
> 
> exactly the way you did it ... 
> 
> *> ii) Is it possible to count the counter wrap in SNMP world ?
> *>     If so, please let me know.
> 
> not to my knowledge
> 
> *> iii) Finally, how we can see the physical utilization as 
> though the link
> *> is over 200Mbps or 1Gbps ?
> 
> you realy need to get into 64bit counters ... some devices 
> support this now
> .. 
> 
> cheers
> tobi
> *> 
> *> Thanks.
> *> 
> *> Best Regards,
> *> Austin Oh (Myoungsub Oh in korean)
> *> National Computerization Agency.
> *> 
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