John Williams wrote: > We have a 7304 that has an uplink on it’s Gig Ethernet port but are seeing > some strange MRTG stats. > The MRTG graph is up and down like a yoyo, one minute it shows the > input/output at around 121Mb 5 minute average, and the next it’s dropped to > around 8Mb 5 minute average. > At first I thought it maybe something wrong on the 7304, but upon looking at > the interface stats on the router the 5 minute output/input rate is always > over 100Mb. > I’ve confirmed with our upstream that the Gig port connects to and they see > us never doing less that 100Mb. > > So I’m not sure where the problem is. > I run Snmpwalk independently from the command line to see what Octets are > reported back from the router and sure enough one minute it says over 100Mb > the next as low as 8Mb. > > I was wondering if anyone else has seen this behaviour from SNMP on a 7304 > router. > The IOS we have on the router is c7300-js-mz.122-28.SB3 which is the latest > version from the Cisco site. > I’ve looked at bug reports for this IOS and see nothing that relates to SNMP > reporting. > > We’ve tried the uplink of a different port and still get the same results. > The interface reports over 100Mb 5 minute average but MRTG graphs show it up > and down from 8Mb to over 100Mb. > > Is it the IOS, the Gig ports, SNMP?? > > Not sure where to look now. > > Thanks for any help you can supply. > > John > > It sounds like you are querying the 32 bit counters instead of th e64 bit counters, and they are rolling over in less than 5 minutes, an easy thing to do with gig-E.
We have had the same problem, for some reason Net-SNMP doesn't present 64 bit counters for anything, only 32 bit counters. Does anyone know why? -- David Grohmann Senior Student Associate Applied Research Lab : UT Austin : ESL - S206 Office: 512-835-3237 Cell: 210-861-6882 -- Unsubscribe mailto:[EMAIL PROTECTED] Archive http://lists.ee.ethz.ch/mrtg FAQ http://faq.mrtg.org Homepage http://www.mrtg.org WebAdmin http://lists.ee.ethz.ch/lsg2.cgi
