How to pull SNMP information from Windows commandline without installing software

net-snmp

I would like to be able to quickly pull SNMP information via commandline such as device uptime. I noticed Net-SNMP's snmpget.exe can do this; but it looks like I need to install Net-SNMP first before I can use that executable.

Isn't there any way to make this executable portable? When I simply copy it to another machine and try to execute it, it complains that netsnmp.dll is missing. If I copy that file to the same folder, it still says the file is missing. I even tried to regsvr32 that dll, but I was unsuccessful.

Maybe there's a better way to get simple SNMP information from the Windows command line using royalty free/non-commercial software?

Edit: It looks like I may be able to answer my own question.

http://www.snmpsoft.com/freetools/snmpget.html "SNMPGet.exe"

Best Answer

Windows does not come with a default SNMP client, so you would have to install software. I recommend the Net-SNMP suite.

http://www.net-snmp.org/

Related Solutions

Windows – 16TB Volumes and SNMP On Windows

A while ago there was a patch for Net-SNMP 5.5 which introduced a new option realStorageUnits for the configuration file.

From the Redhat Bugreport #748410:

To address this issue [negative hrStorageSite values], this update adds a new option to the /etc/snmp/snmpd.conf configuration file, realStorageUnits. By changing the value of this option to 0, users can now enable recalculating all values in hrStorageTable to ensure that the multiplication of hrStorageSize and hrStorageAllocationUnits always produces an accurate device size.

(text in [brackets] is mine)

So adding the configuration directive realStorageUnits 0 to your snmpd.conf might be solving your problem.

However, the values will not be correct up to the very last megabyte; ymmv.

I can't tell if this patch was included in your binary distribution of Net-SNMP, but it would be great if you could report the results and what binary you are using. Also, I didn't test it for the lack of adequate hardware right now.

Sending e-mail when SNMP Trap is received

You can configure snmptrapd to handle traps with a script; this is the traphandle directive.

I believe the configuration file is /etc/snmp/snmptrapd.conf.

For example, you can use:

traphandle IBM-TS3500-MIBv1::ibm3584MIBObjectsTD.0 /usr/local/bin/myscript.pl

Or, to parse everything, you can use:

traphandle default /usr/local/bin/myscript.pl

The contents of the trap is passed to the script in STDIN so your script will need to read from there.

You don't mention your preferred language for scripting this so I won't go into too much detail; however, the following library exists for Perl: SNMP::Trapinfo

You could do something like this:

use strict;
use SNMP::Trapinfo;
my $trap = SNMP::Trapinfo->new(*STDIN, {hide_passwords => 1});
# parse trap here
my $subject = "Got trap from $trap->hostname";
open EMAIL, "|-", "/usr/bin/Mail", "-s", $subject, "me@mydomain.com";
print EMAIL "My Email Body for SNMP Trap";
close EMAIL;

Additionally, it doesn't look like your traps are being fully translated in /var/log/messages. I can't remember which variables you need to set to translate the traps with custom MIBs but you should be able to drop your MIBs in /usr/local/share/snmp/mibs (creating that directory if it doesn't exist).