September 2005
Beginner
462 pages
12h 56m
English
Content preview from Essential SNMP, 2nd Edition
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Graphing Other Objects
MRTG polls and graphs the MIB variables ifInOctets and ifOutOctets by default, but it is possible to poll and graph the values of other objects in addition to polling different kinds of devices. First let's get MRTG collecting input and output octets from a server. To do this, run the following command:
[root][linuxserver] ~/mrtg-2.10.15> cfgmaker public@127.0.0.1 >> /mrtg2/run/mrtg.cfgThis is almost identical to the command we ran earlier in the chapter, except for the community string and target[*] (public@127.0.0.1). We appended the output to the mrtg.cfg file, as opposed to specifying an output file with the —output option; this lets us add a new host to the existing configuration file, instead of starting a new file. Because the existing file already specifies a working directory, we also omitted the working directory option (—global 'WorkDir: ... ' ). This cfgmaker command adds a number of lines like the following to the configuration file:
Target[127.0.0.1_2]: 2:public@127.0.0.1:
SetEnv[127.0.0.1_2]: MRTG_INT_IP="" MRTG_INT_DESCR="eth0"
MaxBytes[127.0.0.1_2]: 12500000
Title[127.0.0.1_2]: Traffic Analysis for 2 -- box
PageTop[127.0.0.1_2]: <H1>Traffic Analysis for 2 -- box</H1>
<TABLE>Figure 12-2. Daily, weekly, monthly, and yearly graphs for Ethernet0
<TR><TD>System:</TD> <TD>box in Atlanta,GA</TD></TR> <TR><TD>Maintainer:</TD> <TD>"kjs@guarded.net"</TD></TR> ...
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