Steve. Fair enough - so I'd have to reduce the polling interval to ensure I don't break the counter if I've got a device which is stuck on SNMP V1.
Shouldn't be a problem - but it might be easier to try and find firmware/software upgrades for the devices in question and get them To run SNMP V2 at least. Thanks. At least I know where to start. Darren -----Original Message----- From: Steven Bertsch [mailto:[EMAIL PROTECTED] Sent: Friday, 8 July 2005 8:23 AM To: [EMAIL PROTECTED] Cc: [email protected] Subject: RE: [jffnms-users] gigabit interfaces Darren, If you're pushing steady 120Mbps, and the interval is 5 minutes, you'll always overflow the 32-bit counter before the next interval. You can figure this out yourself pretty easily: 120,000,000 / 8 = 15,000,000 octets/sec 15,000,000 octets * 60 seconds in a minute * 5 minutes = 4500000000. 4500000000 is greater than 2**32 (4294967296) = overflow! At 05:05 PM 7/7/2005, Darren Gibbs wrote: >Javier. > >Do you need to reduce or increase the interval to make this work? > >I'm in a position where some of my gigabit conencted devices don't >support SNMP V2 or V3, so upgrading them to these versions is not an >option. > >Thanks. > >Darren > >-----Original Message----- >From: [EMAIL PROTECTED] >[mailto:[EMAIL PROTECTED] On Behalf Of Javier >Szyszlican >Sent: Friday, 8 July 2005 3:07 AM >Cc: [email protected] >Subject: Re: [jffnms-users] gigabit interfaces > >Yes, the number is more closer to 140Mbps but yeah. > >You can't if you monitor it every 5 minutes. > >Javier > >Martin Beecroft wrote: > > Hi Javier, > > > > thanks for getting back to me, please ignore my last post from my > > home address. > > > > Does this mean you can only monitor a port that does no more than > > 115Mb/s with snmp v1? > > > > Cheers > > > > Martin > > > > > > Javier Szyszlican wrote: > > > >>Martin, > >> > >>Sure, thats the problem, the counters are rolling over because we're > >>monitoring them every 5 minutes. > >> > >>So, you better switch to SNMPv2 or SNMPv3 if you want to monitor > >>that kind of bandwidth. > >> > >>Javier > >> > >>Martin Beecroft wrote: > >> > >> > >>>Hello, > >>> > >>>I have been using jffnms to monitor our routers for the past few > >>>days now, and have spotted some anomalies on some gigabit interfaces. > >>>When the traffic graphs should be showing traffic in the region of > >>>> 120 Mbit/s it actually shows a very choppy line which goes all > >>>over the place as shown at http://www.beecroft.co.uk/choppy.png. > >>>Our providers graphs do not show this > >>>http://www.beecroft.co.uk/notchoppy.png > >>> > >>>I am using snmp v1, which I assume means the counters are 32 bit, > >>>could this be the problem? > >>> > >>>Has anyone seen this before? Is there any easy way to fix this? > >>> > >>>Regards > >>> > >>>Martin Beecroft > >>> > >>> > >>>------------------------------------------------------- > >>>SF.Net email is sponsored by: Discover Easy Linux Migration > >>>Strategies > >> > >>>from IBM. Find simple to follow Roadmaps, straightforward articles, > >> > >>>informative Webcasts and more! Get everything you need to get up to > >>>speed, fast. > >>>http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click > >>>_______________________________________________ > >>>jffnms-users mailing list > >>>[email protected] > >>>https://lists.sourceforge.net/lists/listinfo/jffnms-users > >> > >> > > > > > > ------------------------------------------------------- > > SF.Net email is sponsored by: Discover Easy Linux Migration > > Strategies from IBM. Find simple to follow Roadmaps, straightforward > > articles, informative Webcasts and more! Get everything you need to > > get up to speed, fast. > > http://ads.osdn.com/?ad_id=7477&alloc_id=16492&op=click > > _______________________________________________ > > jffnms-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/jffnms-users > >-- >=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= >Javier Szyszlican, Project Leader, JFFNMS [EMAIL PROTECTED] > >I hope JFFNMS or I were helpful to you, if you can, please donate at >http://jffnms.org/donate > > > >------------------------------------------------------- >SF.Net email is sponsored by: Discover Easy Linux Migration Strategies >from IBM. Find simple to follow Roadmaps, straightforward articles, >informative Webcasts and more! 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