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hajid
Beginner
Joined: 15 Apr 2005
Posts: 2
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 Posted: Sat Apr 16, 2005 3:27 am Post subject: Graphing for wireless RSSI negative value |
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i want make graph for monitoring my radio. with snmpget i can get the data that return negative number. how to make graph for this value. how about minimum value, maximum value,multiplier value shoul i fill?
snmpget -c public -v 1 172.33.0.5 .1.3.6.1.4.1.841.201.4.6.0
return data SNMPv2-SMI::enterprises.841.201.4.6.0 -70 |
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silfreed
Site Admin
Joined: 19 Jan 2003
Posts: 394
Location: Shippensburg, PA, USA
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| Posted: Sun Apr 17, 2005 1:12 pm Post subject: Re: Graphing for wireless RSSI negative value |
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| hajid wrote: |
| i want make graph for monitoring my radio. with snmpget i can get the data that return negative number. how to make graph for this value. |
Shouldn't be a problem.
| hajid wrote: |
| how about minimum value, maximum value,multiplier value shoul i fill? |
Since this is probably a gauge (probably SNR dBm?), I wouldn't worry about min/max for the monitor too much. Just let them 'U' and things should be fine.
I would just set the multipler to be '1' (the defautl). We typically only change it when we need to alter the scale of the graph.
Enter your OID in the SNMP tests and create your monitor as a gauge. After that, you can either create a custom or template graph based on whether you'll be making more graphs like this or not. Let me know if you need some help on making a custom/template graph and applying it to your device; I think there's some other posts around here about that, though.
-Doug |
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jbaland
Beginner
Joined: 27 Jul 2005
Posts: 2
Location: Sedona, Az
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| Posted: Thu Jul 28, 2005 9:08 pm Post subject: |
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The normal graphing like above suggests works just fine. NetMRG will graph the negative number, and 0 will be at the top instead of the bottom.
I had one unique case where I wanted to compare my negative dBm reading with a positive temperature reading on another device. For this, I entered a multiplier of -1 in the graph setup for the dBm item. Remember if you multiply a negative with -1 you inverse the data so it graphs as a positive number. |
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