Re: Using SNMP...

[Gary E. Miller]

Yo David!

On Sun, 29 Jan 2023 06:38:55 +0000
David Taylor <davidtaylor@writeme.com> wrote:

> Perhaps I should have written 3.25.1~dev, that's what cgps tells me.
> 
>    cgps: 3.25.1~dev (revision release-3.23.1-897-gadcab3c2a)

That I beleive.

> I did no special configuration of snmpd

snmpget, snmpwalk, etc talk to snmpd, and snmp talks to gpsd bu way
of gpssnmp, which you configure in your snmp.conf.  As shown on the
gpssnmp man page:

       gpssnmp can work as a "pass-through script" with snmpd. To
       enable this functionality on an already working snmpd
       installation, add this to your snmpd.conf file, and then restart
       snmpd:

           # be sure SNMPv2 community "public" can access all MIBs:
           rocommunity public  localhost

           # configure pass-thur of GPSD-MIB to gpssnmp
           pass .1.3.6.1.4.1.59054  /usr/local/bin/gpssnmp



> What
> should I have done?

What the man page (above) says to do.

> Here are the results from the tests you suggested:
> 
> pi@RasPi-23:~ $ snmpgetnext -v 2c localhost -c public
> .1.3.6.1.4.1.59054.3.2.1.1 iso.3.6.1.6.3.1.1.6.1.0 = INTEGER:
> 1952941162

That only works if you did the gpssnmp configuration above.
 
> pi@RasPi-23:~ $ snmpwalk  -v 2c localhost -c public gpsd
> gpsd: Unknown Object Identifier (Sub-id not found: (top) -> gpsd)
> pi@RasPi-23:~ $ snmpwalk  -On -v 2c localhost -c public gpsd
> gpsd: Unknown Object Identifier (Sub-id not found: (top) -> gpsd)

You also forgot to install the GPSD-MIB.  Where it goes is system
dependent.  On Gentoo it goes here:
        /usr/share/snmp/mibs/GPSD-MIB

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        gem@rellim.com  Tel:+1 541 382 8588

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