[mrtg] Re: Using MIB's in MRTG

[Koelstra, J. (Jan)]

Alan,

Add the following line:

Options[10.10.2.1_4]: Gauge

This will prevent MRTG to calculate the rate. By default MRTG calculates
the rate by subtracting the previous result from the last result and
divide it by the elapsed time in seconds. 

Hth,

Jan.

-----Original Message-----
From: Dawson, Alan [mailto:DawsonA at chesterfield.ac.uk] 
Sent: Tuesday, March 09, 2004 11:29 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Using MIB's in MRTG


Hi All

I'm trying to get MRTG to measure signal strength and packet speed on a
802.11b wifi network.

I've got a MIB for HostAP access points from here
http://www.avantcom.com/snmpAVC80211.asp

which seems to be working as I can get results like for signal rx
strength

boneidol:~ # snmpget 10.10.2.1 public
.1.3.6.1.3.14614.2.1.1.1.19.2.0.9.91.66.15.141
14614.2.1.1.1.19.2.0.9.91.66.15.141 = 41

and for packet last rx rate

boneidol:~ # snmpget 10.10.2.1 public
.1.3.6.1.3.14614.2.1.1.1.20.2.0.9.91.66.15.141
14614.2.1.1.1.20.2.0.9.91.66.15.141 = 10



So I put them in an mrtg stanza like 

### Interface 4 >> Descr: 'wlan0wds0' | Name: '' | Ip: '' | Eth: '' ###

Target[10.10.2.1_4]:.1.3.6.1.3.14614.2.1.1.1.19.2.0.9.91.66.15.141&.1.3.
6.1.
3.14614.2.1.1.1.20.2.0.9.91.66.15.141:public at 10.10.2.1:
SetEnv[10.10.2.1_4]: MRTG_INT_IP="" MRTG_INT_DESCR="wlan0wds0"
MaxBytes[10.10.2.1_4]: 1250000
Title[10.10.2.1_4]: Traffic Analysis for 4 -- BoneIdol
PageTop[10.10.2.1_4]: <H1>Traffic Analysis for 4 -- BoneIdol</H1>
<TABLE>
   <TR><TD>System:</TD>     <TD>BoneIdol in Unknown</TD></TR>
   <TR><TD>Maintainer:</TD> <TD>root@</TD></TR>
   <TR><TD>Description:</TD><TD>wlan0wds0  </TD></TR>
   <TR><TD>ifType:</TD>     <TD>ethernetCsmacd (6)</TD></TR>
   <TR><TD>ifName:</TD>     <TD></TD></TR>
   <TR><TD>Max Speed:</TD>  <TD>10.0 Mbits/s</TD></TR>
 </TABLE>

and put mrtg to run with cron.


Now .. Heres the problem

My files 10.10.2.1_4.log and 10.10.2.1_4.old never gets any data in it
.. though the first line looks promising  
for example

boneidol:/usr/local/httpd/htdocs/BoneIdolWifi # less 10.10.2.1_4.log
1078831204 42 110 1078831204 0 0 0 0 1078830904 0 0 0 0 1078830900 0 0 0
0

and 
boneidol:/usr/local/httpd/htdocs/BoneIdolWifi # less 10.10.2.1_4.old
1078830904 42 10 1078830904 0 0 0 0 1078830604 0 0 0 0


Help ... !  and Thanks

Alan Dawson
ICT Services
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