[mrtg] cfgmaker base: Walking vmVlan fails

[bart sikkes]

hello,

I have been using mrtg without problems for a long time but recently
encountered some problems with routers from a new WAN provider. during
cfgmaker it fails on the vmVlan walking

--base: Walking vmVlan
SNMP Error:
Received SNMP response with error code
  error status: noSuchName
  index 1 (OID: 1.3.6.1.4.1.9.9.68.1.2.2.1.2)
SNMPv1_Session (remote host: "154.169.0.89" [154.169.0.89].161)
                  community: "test"
                 request ID: -591419100
                PDU bufsize: 8000 bytes
                    timeout: 2s
                    retries: 5
                    backoff: 1)
 at /usr/bin/../lib/mrtg2/SNMP_util.pm line 627
SNMPWALK Problem for 1.3.6.1.4.1.9.9.68.1.2.2.1.2 on
test at 154.169.0.89::::::v4only
 at /usr/bin/cfgmaker line 150

this happens for the FastEthernet0/0 interface and because of the
error it is commented out in the final config. the interface is up and
traffic flows through it.

I tried snmpwalking the device myself and that seems to work fine, so
community string is ok and device does allow some polling.

this is a Cisco 1841 router, IOS version Version 12.4(25d), exact SNMP
settings are unknown, as it is a provider managed device.

any clue where to look for the issue? mrtg setting, device setting?

thanks in advance,
bart