Steve Shipway wrote:
I'm attempting to cross-compile mrtg for openwrt on a mipsbe processor.
...
SNMPv1_Session (remote host: "10.255.255.253" [10.255.255.253].161)
community: "public"
request ID: -552632565
PDU bufsize: 8000 bytes
timeout: 2s
retries: 5
backoff: 1)
at /usr/share/mrtg/bin/../lib/mrtg2/SNMP_util.pm line 631
SNMPWALK Problem for 1.3.6.1.2.1.1 on [email protected]:::::1:v4only
at ./cfgmaker line 950
...
r...@openwrt:/usr/share/mrtg/lib/mrtg2# snmpwalk -c public -v 1
10.255.255.253 1.3.6.1.2.1.1
...
iso.3.6.1.2.1.1.1.0 = STRING: "router"
iso.3.6.1.2.1.1.2.0 = OID: iso.3.6.1.4.1.14988.1
iso.3.6.1.2.1.1.3.0 = Timeticks: (46821500) 5 days, 10:03:35.00
iso.3.6.1.2.1.1.4.0 = STRING: "test-box"
iso.3.6.1.2.1.1.5.0 = STRING: "wrtName"
iso.3.6.1.2.1.1.6.0 = STRING: "here"
iso.3.6.1.2.1.1.7.0 = INTEGER: 78
Sounds as if the problem lies in the SNMP_util module, which is part of the
MRTG installation. I have no familiarity with your OS but it may be that this
module is making some assumptions about SNMP - maybe there are permissions
issues on who can listen the UDP responses, for example.
Since snmpwalk works we know the issue is not the agent, but snmpwalk uses
different code to SNMP_util.pm.
I'd suggest you direct your investigations to this module, maybe make a small
Perl script to use it to make a single SNMP lookup and see if that works?
Steve
Thanks for the responses. I took the easy way out and decided to use a
different monitoring tool. Found that rrd was a pre-compiled package for
my openwrt install. Gave that a try and got it working.
Unfortunately, this project is short-fused and I don't have much time to
troubleshoot the mrtg install...even though I got this far :) I agree,
the problem was probably in SNMP_util.pm. I didn't get too far in
examining that or the packet dumps that I captured. I'm also wondering
if running the perl code on a big endian machine vs a little endian
machine made a difference?
Thanks again
Brandon
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