[mrtg] mrtg/rrdtool problem

[Lester, Hiram]

I'm posting this to both mrtg and rrd-users because I'm not sure where the
problem lies.
 
I have had a RedHat 7.3 server running mrtg 2.9.25 and rrdtool 1.0.39 for
quite some time. I was not involved when the server was initially
configured. I decided to upgrade to mrtg 2.10.11 and rrdtool 1.0.45. I now
get the following errors:
 
ERROR: Target[10.72.19.1_1][_IN_] ' $target->[0]{$mode} ' did not eval into
defined data
ERROR: Target[10.72.19.1_1][_OUT_] ' $target->[0]{$mode} ' did not eval into
defined data
ERROR: Target[10.72.19.1_2][_IN_] ' $target->[1]{$mode} ' did not eval into
defined data
ERROR: Target[10.72.19.1_2][_OUT_] ' $target->[1]{$mode} ' did not eval into
defined data
I was getting this for all of my router config files, so I created a new
mrtg.cfg file and a single router config file to test with. When I remove
the "LogFormat: rrdtool", mrtg alone will collect the data in the .log file
and produce the html and png files, so I know it's collecting data. It's
apparently something in the interface between mrtg and rrdtool, but I'm not
sure where to begin troubleshooting. If it matters, I used zlib 1.2.1, gd
1.8.4, and libpng 1.2.5 to compile mrtg with. I notice that rrdtool comes
with zlib 1.1.4, gd 1.3, and libpng 1.0.9.
 
I ran rrdtool info against one of the rrd databases and it indicates unknown
data. I also tried changing the IP address in the router config file to
verify that the error is not a connection problem. I get additional errors
when it can't connect to the router.
 
If someone can give me some idea what to try next to get this working, I'd
appreciate it. Thanks.
 
Hiram Lester, Jr., MCSE, MCP+I
Network Engineer
NorthStar Communications Group

 


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