[mrtg] Using SNMP v2

Peter Glanville peter_glanville at cuk.canon.co.uk
Thu May 15 12:06:42 MEST 2003

Hi all,
Can anyone spot the really obvious mistake I must have made.

I decided to upgrade to 64 bit counters for the Gigabit interface on my
3Com 3500.

I used Getif to check ifHCInOctets.1 (&ifHCOutOctets.1) and both return a
value (displayed as 16 bytes of Hex)
I think that this proves that the device supports 64 bit counters.

I then added :::::2 to my Target line (in a working MRTG.cfg)
The line now reads "Target[Gig_interface_1]: 1:public at"

But running MRTG now gives:
SNMP Error:
no response received
SNMPv2c_Session (remote host: "" [].161)
                   community: "public"
                  request ID: 1108138999
                 PDU bufsize: 8000 bytes
                     timeout: 2s
                     retries: 5
                     backoff: 1)
SNMPGET Problem for ifHCInOctets.1 ifHCOutOctets.1 sysUptime sysName on
public at
WARNING: skipping because at least the query for ifHCInOctets.1 on did not succeed

I suspect my problem is a silly one, but please point out my stupidity. TIA

Win2k, MRTG 2.9.25

Peter Glanville
Network Analyst, ICtS, Canon (UK) Ltd

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