[mrtg] strange behavior when link fails

Thurston, David DThurston at mvusd.k12.ca.us
Fri Aug 10 17:52:19 MEST 2001

Hi All,

I experiencing some strange behavior in MRTG when my frame-relay links fail.
During the outage period my graphs return the flat line (1%) reading, which
I understand is an assumption made by MRTG concerning the nature of upd
transmission; however, once the communication has been restored my graph
never returns to normal. I know that the devices, both NT servers and Cisco
routers, are still responding to SNMP queries because I can walk their MIBs
using Getif and other MIB browsers, so I'm at a loss as to why MRTG is not
picking up the response and graphing the data. Has anybody out there
experienced the same problem? Any information any one can give me will be
greatly appreciated.


David Thurston

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