[mrtg] Oddness: one ascend box is sulking, or is it?

[Kieran Hartnett]

I'm currently having some trouble with an Ascend MAX that keeps
upsetting MRTG, despite the fact that

a) All the other (AFAICT identically configured) Maxen are fine.
b) snmpget can get the relevant bits from it quite happily.

A config snippet:

Target[ascend.energis]:
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-131 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-132 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-133 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-134 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-135 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-136 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-138 +
1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-139
[end snippet]

This works fine. However, if I exchange box-139 for box-137 and run
mrtg on the config file, I get this:

[root at tools manual]# mrtg ascend.boxen.cfg 
NJC
SNMP Error:
no response received
SNMPv1_Session (remote host: "box-137" [192.168.1.137].161
                  community: "public"
                 request ID: 2128721282
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
SNMPGET Problem for 1.3.6.1.4.1.529.10.5.0 1.3.6.1.4.1.529.11.3.0
sysUptime sysName on public at box-137
SNMPGET: Failed to reach target:
"1.3.6.1.4.1.529.10.5.0&1.3.6.1.4.1.529.11.3.0:public at box-137". I
tried multiple times!
[end output]

SNMPget doesn't have any trouble at all:

[root at tools manual]# snmpget box-137 public .1.3.6.1.4.1.529.10.5.0
enterprises.529.10.5.0 = 89
[root at tools manual]# snmpget box-137 public .1.3.6.1.4.1.529.11.3.0
enterprises.529.11.3.0 = 90
[end output]

So why on Earth is this box in particular killing MRTG? Any tips or
ideas would be greatly appreciated!
-- 
Kieran Hartnett, Network Engineer
Tel: +44 20 8852 2076

The Direct Connection - http://www.dircon.net

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