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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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 Posted: Tue Mar 04, 2008 10:33 am Post subject: [HOWTO] Install and configure the Net-SNMP agent for Windows |
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- Version 0.2 (03/06/2008) : added a note about snmpd.conf file creation
- Version 0.1 (03/04/2008) : intial release
This HowTo will explain how to install and configure the Net-SNMP agent for Windows, as a "subagent" of the Microsoft SNMP agent, to graph the output of custom scripts.
As the time of writing, the latest version of Net-SNMP available is 5.4.1 (published on 07/27/2007).
Chapter I: Getting Net-SNMP binaries
Net-SNMP 5.4.1 for Windows can be downloaded here.
There's even an SSL version.
Once the file is downloaded, you just have to run the installer :
You then have to accept the license :
Next, you have to choose which type of agent you want to run :
- as a standard agent
- as a "subagent" of the Microsoft SNMP agent
Select the second option :
Next, choose an installation directory (C:\usr by default) :
Next, select an existing or a new Start menu folder :
The installer then copies the files :
Once installed, you have to register the Net-SNMP service
Chapter II: Configuring the Net-SNMP agent
The Windows SNMP service must be installed, but the service must be disabled.
Depending on where you've installed Net-SNMP, the main configuration file (snmpd.conf) will be located in <path>\etc\snmp (by default, C:\usr\etc\snmp).
The snmpd.conf has to be created.
Please note that you need to restart the "Net-SNMP Agent" service whenever you modify snmpd.conf !
The minimum configuration is this one :
Start then the "Net-SNMP Agent" service, and query it :
| Code: | C:\usr\bin>snmpwalk.exe -v 1 -c public localhost sysdesc
SNMPv2-MIB::sysDescr.0 = STRING: Hardware: x86 Family 6 Model 9 Stepping 5 AT/AT COMPATIBLE - Software: Windows 2000 Version 5.1 (Build 2600 Uniprocessor Free) |
This OID got an anwser from the Microsoft SNMP service, whereas
| Code: | C:\usr\bin>snmpwalk.exe -v 1 -c public localhost versiontag
UCD-SNMP-MIB::versionTag.0 = STRING: 5.4.1 |
got an answer from the Net-SNMP agent.
At this point, you can use the "Windows XP/2000/2003" host template in Cacti, to graph CPU usage, disk drives usage, network bandwidth, etc.
Chapter III: Extending the Net-SNMP agent
A great functionnality of Net-SNMP is that you can "extend" it.
Let's run the C:\temp\foo.cmd script :
| Code: | C:\temp\foo.cmd
123 |
Now put this in snmpd.conf :
| Code: | | exec foo c:\temp\foo.cmd |
The result of your script will be accessible under the ucdavis.extTable.extEntry tree :
- output of the script : ucdavis.extTable.extEntry.extOutput
- exit status : ucdavis.extTable.extEntry.extResult
- command : ucdavis.extTable.extEntry.extCommand
You can check the result with this SNMP query :
| Code: | C:\temp>snmpwalk.exe -v 1 -c public localhost exttable
UCD-SNMP-MIB::extIndex.1 = INTEGER: 1
UCD-SNMP-MIB::extNames.1 = STRING: foo
UCD-SNMP-MIB::extCommand.1 = STRING: c:\temp\foo.cmd
UCD-SNMP-MIB::extResult.1 = INTEGER: 0
UCD-SNMP-MIB::extOutput.1 = STRING: 123
UCD-SNMP-MIB::extErrFix.1 = INTEGER: noError(0)
UCD-SNMP-MIB::extErrFixCmd.1 = STRING: |
extOutput translates to .1.3.6.1.4.1.2021.8.1.101
As "foo" is our first exec directive, add ".1" at the end of the OID.
In Cacti, use the "SNMP - Generic OID Template" like this :
Voila ! Result of the C:\temp\foo.cmd script is now graphed in Cacti.
Last edited by fmangeant on Thu Mar 06, 2008 5:23 am; edited 1 time in total |
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 3:38 am Post subject: No Response from localhost |
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C:\net-snmp\bin>snmpwalk.exe -v 1 -c public localhost sysdesc
Timeout: No Response from localhost
C:\net-snmp\bin>snmpwalk.exe -v 1 -c public localhost versiontag
Timeout: No Response from localhost |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 4:03 am Post subject: |
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| Have you created snmpd.conf, and restarted the "Net-SNMP agent" service ? |
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 4:21 am Post subject: Restarging Net-SNMP agent |
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Sorry, I am new to this SNMP. How to restart the Net-SNMP agent" service ?
I have searched in the Windows Serive not able to find... |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 4:34 am Post subject: |
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| Have you registered the service ? |
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 4:49 am Post subject: Net-SNMP agent |
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1) I registered the serivice by executing registeragent.bat
2) C:\net-snmp\bin>net stop "net-snmp agent"
Output:The Net-SNMP Agent service was stopped successfully.
3) C:\net-snmp\bin>net start "net-snmp agent"
Output:The Net-SNMP Agent service was started successfully.
4) C:\net-snmp\bin>snmpwalk.exe -v 1 -c public localhost versiontag
Output:Timeout: No Response from localhost
5) C:\net-snmp\bin>snmpwalk.exe -v 1 -c public localhost sysdesc
Output:Timeout: No Response from localhost
Please check the output for the step 4 and 5. |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 4:51 am Post subject: |
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| Can you post the content of C:\net-snmp\etc\snmp\snmpd.conf ? |
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 4:58 am Post subject: snmp.conf Content |
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mibdirs C:/net-snmp/share/snmp/mibs
persistentDir C:/net-snmp/snmp/persist
tempFilePattern C:/net-snmp/temp/snmpdXXXXXX
Note: I dont have the folder name 'snmpdXXXXXX' under the path 'C:/net-snmp/temp/snmpdXXXXXX' remaining all fine. |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 4:58 am Post subject: |
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| C:\net-snmp\etc\snmp\snmpd.conf is a file which has to be created. |
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 5:05 am Post subject: Created snmpd.conf file |
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Now i have created the snmpd.conf file under the path C:\net-snmp\etc\snmp\snmpd.conf .
I restarted. Again same result.
But no need to worry about tempFilePattern C:/net-snmp/temp/snmpdXXXXXX (OR) i need to change to tempFilePattern C:\net-snmp\etc\snmp\snmpd.conf |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 5:08 am Post subject: |
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I haven't modified the snmp.conf, and it works.
Is your Microsoft SNMP agent stopped ? |
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 5:15 am Post subject: Stopped & Started... |
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Yes it get stopped and started.
1) C:\net-snmp\bin>net stop "net-snmp agent"
The Net-SNMP Agent service was stopped successfully.
2) C:\net-snmp\bin>net stop "net-snmp agent"
The Net-SNMP Agent service was stopped successfully.
After creating C:\net-snmp\etc\snmp\snmpd.conf no need to modify right ? Its a blank file ? |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 5:18 am Post subject: |
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You need to install Microsoft SNMP agent, and let it stopped.
C:\net-snmp\etc\snmp\snmpd.conf has to contain something like this :
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elayaraja.s
Cacti User
Joined: 11 Feb 2008
Posts: 137
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| Posted: Thu Mar 06, 2008 6:30 am Post subject: Executed. |
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C:\net-snmp\bin>snmpwalk.exe -v 1 -c public localhost versiontag
Output: UCD-SNMP-MIB::versionTag.0 = STRING: 5.4.1
C:\net-snmp\bin>snmpwalk.exe -v 1 -c public localhost sysdesc
Output: No output.....Its blank..
Last edited by elayaraja.s on Fri Mar 07, 2008 12:01 am; edited 1 time in total |
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fmangeant
Cacti Guru User
Joined: 19 Sep 2003
Posts: 2324
Location: Sophia-Antipolis, France
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| Posted: Thu Mar 06, 2008 7:45 am Post subject: |
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| Did you install Net-SNMP as screenshot #3 ? |
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