[mrtg] Error decoding response PDU?

[Isaac Grover]

Greetings everyone.

I noticed in my mailbox this morning a message from my cron
daemon indicating the above message, and found that it was
generated by BER.pm.  It's the first time I've seen it, and I'm
assuming it was just a fluke but I'd like to know what the actual
error means JIC I ever see it again.

Here's the content of the message:

SNMP Error:
Error decoding response PDU:
  Expected sequence tag 48, got 1
    %{%i%s%*{%i%i%i%{%@
      ^
SNMPv1_Session (remote host: "192.168.xx.xx" [192.168.xx.xx].161
                  community: "public"
                 request ID: 1143296257
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)

And here is a portion of the mrtg config file:

WorkDir: /usr/home/isaac/public_html/mrtg/uni/
IconDir: ../mrtg/graphics/
Refresh: 300
Interval: 5
WithPeak[_]: dwmy
Options[^]: growright, bits,
LogFormat: rrdtool
PathAdd: /usr/local/rrdtool-1.0.28/bin/
LibAdd: /usr/local/rrdtool-1.0.28/lib/perl/

Target[192.168.xx.xx.2001]:
1.3.6.1.4.1.800.2.4.3.1.1.4.2.1&1.3.6.1.4.1.800.2.4.3.1.1.7.2.1:engr at 192.168.xx.xx*53

MaxBytes[192.168.xx.xx.2001]: 19375000
Title[192.168.xx.xx.2001]: OSW3-213 CSM-155
PageTop[192.168.xx.xx.2001]: <H1>CSM-155

Target[192.168.xx.xx.3001]: 3001:engr at 192.168.xx.xx
MaxBytes[192.168.xx.xx.3001]: 12500000
Title[192.168.xx.xx.3001]: OSW3-213 10/100Mb Ethernet CSMA/CD
interface
PageTop[192.168.xx.xx.3001]: 10/100Mb Ethernet CSMA/CD interface


FYI, I'm running mrtg 2.9.2 + rrdtool 1.0.28 on a FreeBSD
4.1.1-RELEASE-i386 box.


--
Isaac Grover - isaac at coe.engr.sjsu.edu
SJSU College of Engineering, ECS / Networking
ENG 237, (408) 924-4074




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