[mrtg] Can not determine ifNumber for public at gw

[Brian J. Murrell]

Since a recent upgrade to mrtg 2.16.2, when mrtg runs it complains:

2010-03-16 08:20:03: WARNING: Can not determine ifNumber for public at gw:         ref: 'Descr'    key: 'ppp0'
2010-03-16 08:20:04: ERROR: Target[gw_ppp0][_IN_] ' $target->[10]{$mode} ' did not eval into defined data
2010-03-16 08:20:04: ERROR: Target[gw_ppp0][_OUT_] ' $target->[10]{$mode} ' did not eval into defined data

I did some googling and one recommendation was to simply remove the "ok"
file.  I believe on Ubuntu the "ok" file is /var/lib/mrtg/_etc_mrtg.cfg:

public at gw_      Descr   br-lan  7
public at gw_      Descr   eth0    2
public at gw_      Descr   eth0.0  4
public at gw_      Descr   eth0.1  5
public at gw_      Descr   eth0.2  6
public at gw_      Descr   eth1    3
public at gw_      Descr   imq0    10
public at gw_      Descr   imq1    11
public at gw_      Descr   lo      1
public at gw_      Descr   ppp0    Dup
public at gw_      Descr   sit0    9
public at gw_      Descr   sixxs   14
public at gw_      Descr   tun0    13
public at gw_      Eth             Dup
public at gw_      Eth     00-99-60-43-2f-1a       Dup
public at gw_      Eth     10-11-18-10-02-4d       3
public at gw_      Eth     41-a1-c4-90-10-01       14
...

Is that correct?

I have tried removing that file and it simply gets recreated with the
exact same contents and the error messages persist.

Any other ideas?

Thanx!
b.

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