If I could make a feature request of future KarlNet MIBs, I'd have to
say that it would be nice if there were SNMP variable of the signal and
noise that were averaged over a period of time like 1 minute. The
reason is that it is very noisy if you try to graph it and not all SNMP
monitoring tools make it worth looking at because not all of them let
you manipulate the data easily. If the device could somehow keep some
snapshots of the signal and noise and average it and return that, it
would make graphing using the more user-friendly tools much more
manageable. I'd also be interested in having the MIB entries explained
a bit better, there are some that I don't quite understand and some that
are constantly 0... Polling the radios to get the other side of the
link can also be slow if you are limiting speeds on the raido interface
configuration. It would be nice if firmwares had an option to allow
full speed data transmission from a particular host or protocol (like
SNMP.)
Right now with RRDTool you have to do things like this to get a good
trend, given "/path/to/some.rrd" is the file with your data, "ds0" is
the datasource name in the RRD, and "signal" is the variable that you
will be graphing using a LINE or AREA on the graph (this requires a
relatively new version of RRDTool since older versions didn't support
the PREV() operator to operate on datapoints farther back in time:
DEF:_signal=/path/to/some.rrd:ds0:AVERAGE
CDEF:s1=PREV(_signal)
CDEF:s2=PREV(s1)
CDEF:s3=PREV(s2)
CDEF:s4=PREV(s3)
CDEF:s5=PREV(s4)
CDEF:s6=PREV(s5)
CDEF:s7=PREV(s6)
CDEF:s8=PREV(s7)
CDEF:s9=PREV(s8)
CDEF:s10=PREV(s9)
CDEF:signal=s1,s2,s3,s4,s5,s6,s7,s8,s9,s10,+,+,+,+,+,+,+,+,+,10,/
-----Original Message-----
From: karlnet-bounces@WISPNotes.com
[mailto:karlnet-bounces@WISPNotes.com] On Behalf Of Bob Hrbek
Sent: Thursday, November 13, 2003 6:09 PM
To: Karlnet Mailing List
Subject: Re: [Karlnet] Conversion of SNR values to dB
WOW, that is really nice. care to share? :)
----- Original Message -----
From: "Phil" <phil@succeed.net>
To: "'Karlnet Mailing List'" <karlnet@WISPNotes.com>
Sent: Thursday, November 13, 2003 7:28 PM
Subject: RE: [Karlnet] Conversion of SNR values to dB
> Ok here's a few examples:
>
> http://users.succeed.net/~philliph/karlnet/
>
>
> -----Original Message-----
> From: karlnet-bounces@WISPNotes.com
> [mailto:karlnet-bounces@WISPNotes.com] On Behalf Of Ben Polson
> Sent: Thursday, November 13, 2003 12:38 PM
> To: Karlnet Mailing List
> Subject: RE: [Karlnet] Conversion of SNR values to dB
>
> Thanks Phil. Sure, I'd love to see what this has produced for you.
>
> > -----Original Message-----
> > From: karlnet-bounces@WISPNotes.com
> > [mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Phil
> > Sent: Thursday, November 13, 2003 12:33 PM
> > To: 'Karlnet Mailing List'
> > Subject: RE: [Karlnet] Conversion of SNR values to dB
> >
> >
> > I'm not sure if it is correct but I've been dividing by 2 and then
> > subtracting 95. I can show some examples of my S/N graphs that I
> > generate for all of our customers and APs if anyone wants to see
them.
> > (not attached of course)
> >
> >
> > -----Original Message-----
> > From: Ben Polson [mailto:bsp@bandwave.net]
> > Sent: Tuesday, November 04, 2003 11:33 AM
> > To: Karlnet Mailing List
> > Subject: [Karlnet] Conversion of SNR values to dB
> >
> > Does anyone know the algorithm to convert the INTEGER values
returned
> > from
> > the OIDs for signal and noise into dB values?
> >
> > A signal value of 86 and noise value of 10 aren't as helpful as the
dB
> > values. Thanks in advance.
> >
> > -Ben.
> >
> > _______________________________________________
> > Karlnet mailing list
> > Karlnet@WISPNotes.com
> > http://lists.wispnotes.com/mailman/listinfo/karlnet
> >
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