[mrtg] SNMP - No Response Received

[Butch Kemper]

I recently upgraded to MRTG 2.10.5 from 2.8.12 hoping to fix a problem of 
SNMP "no response received" error messages.  Unfortunately, the problem has 
gotten worse.

I am monitoring a NetGear FSM726S switch and the Linux box running MRTG is 
connected to one of the ports.  The monitor interval is 5 minutes and about 
60% of the time, the switch will return the SNMP data but other times it 
does not and MRTG reports a "no response received" error message. Sometimes 
MRTG will report the error for several consecutive intervals and then there 
are no error messages for several consecutive intervals.

In an attempt to fix the problem, I added this command to the configuration 
file:

         SnmpOptions: retries => 3, timeout => 3

In the error messages receive from MRTG, it appears that these options are 
being ignored:

         SNMP Error:
         no response received
         SNMPv1_Session (remote host: "********************"
          [***.***.***.***].161)
                   community: "********"
                  request ID: -1146335597
                 PDU bufsize: 8000 bytes
                     timeout: 2s
                     retries: 5
                     backoff: 1)
         at /usr/local/mrtg/bin/../lib/mrtg2/SNMP_util.pm line 486
         SNMPGET Problem for ifInOctets.1 on *****@********::::::v4only
         at bin/mrtg line 1794

The SNMP no response received error messages periodically occur with other 
devices that are being monitored but the problem is significantly worse 
with the NetGear Switch.

Any suggestions would be appreciated.

Thanks.

Butch



TSTAR Internet, Inc         | Making the Net Work
Marble Falls, TX            | Serving Blanco, Burnet,
830-693-6967                | Llano, and Mason Counties

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