topic Re: SNMP extensibility in Operating System - Linux

SNMP extensibility

Joey Groff — Tue, 19 Jun 2001 15:30:27 GMT

I am working on a LH3000 Netserver. Currently I've installed net-snmp, and I've gotten all the basic functions to work (snmpget, snmptrap) and the daemons set up on the netserver.

What I'm attempting to do is to implement some of the HP mibs so that I will be able to use SNMP to tell when a powersupply goes out, or a RAID drive is full/goes out, things of that nature.

Any pointers in the right direction would be greatly appreciated, Thanks.

Re: SNMP extensibility

Patrick Preuss — Sat, 24 Nov 2001 11:23:27 GMT

Hi,
as far as i know.
You can extend Net Snmp with any Mib Values you want.

you can try this
from /usr/share/snmp/snmpconf/snmpd.conf/extending
token exec
info run a simple command using exec()
info arguments: [oid] name /path/to/executable arguments
question 1 The OID where the results table should be display [default=extTable]
question 2 The "name" to associate with this command when displaying the results
question 3 The path to the program to be run.
question 4 The arguments to pass to $3
# from the conf
exec .1.3.6.1.4.1.2021.50 shelltest /bin/sh /tmp/shtest

# % snmpwalk -v 1 localhost public .1.3.6.1.4.1.2021.50
# enterprises.ucdavis.50.1.1 = 1
# enterprises.ucdavis.50.2.1 = "shelltest"
# enterprises.ucdavis.50.3.1 = "/bin/sh /tmp/shtest"
# enterprises.ucdavis.50.100.1 = 35
# enterprises.ucdavis.50.101.1 = "hello world."
# enterprises.ucdavis.50.101.2 = "hi there."
# enterprises.ucdavis.50.102.1 = 0

for example you get the values from your raid adapter and put the at the deired point in the mib

if you have the mibs and a mib browser you can look up the oid value for the raid sub system for an net server.

Look at:
http://net-snmp.sourceforge.net/tutorial/agent/guide.html

Re: SNMP extensibility

Patrick Preuss — Sat, 24 Nov 2001 11:26:07 GMT

Hi,
as far as i know.
You can extend Net Snmp with any Mib Values you want.

you can try this
from /usr/share/snmp/snmpconf/snmpd.conf/extending
token exec
info run a simple command using exec()
info arguments: [oid] name /path/to/executable arguments
question 1 The OID where the results table should be display [default=extTable]
question 2 The "name" to associate with this command when displaying the results
question 3 The path to the program to be run.
question 4 The arguments to pass to $3

exec .1.3.6.1.4.1.2021.50 shelltest /bin/sh /tmp/shtest

# % snmpwalk -v 1 localhost public .1.3.6.1.4.1.2021.50
# enterprises.ucdavis.50.1.1 = 1
# enterprises.ucdavis.50.2.1 = "shelltest"
# enterprises.ucdavis.50.3.1 = "/bin/sh /tmp/shtest"
# enterprises.ucdavis.50.100.1 = 35
# enterprises.ucdavis.50.101.1 = "hello world."
# enterprises.ucdavis.50.101.2 = "hi there."
# enterprises.ucdavis.50.102.1 = 0

for example you get the values from your raid adapter and put the at any desired point in the mib.
FOR HP Netserver RAID adapter take a look at the HP Mibs and change the oid Value to this.

exec shelltest /bin/sh cat /proc/sys/myraidvalues

Look at:
http://net-snmp.sourceforge.net/tutorial/agent/guide.html

regards
Patrick

Re: SNMP extensibility

Patrick Preuss — Sat, 24 Nov 2001 11:28:04 GMT

Sorry for the First posting but my Internet link has been broken:-)

regards
Patrick