How to enable SNMP on a Linksys/Cisco SLM2008 switch

In this post I will show you how to enable SNMP on a Linksys/Cisco SLM2008. All credits go out for Romain Boissat who made this post:https://chroot-me.in/blog/index.php/blog/35.

First off all you need the download the script from https://chroot-me.in/blog/media/enable_snmp.pl and need to have a Linux box with Perl installed.

The first time I ran the script on Debian 6 I got the following error:

On Debian 6 you have to install the package libwww-perl to get the script working:

apt-get install libwww-perl

After you installed the libwww-perl module you can rerun the script:

quote from https://chroot-me.in/blog/index.php/blog/35:

$ ./enable_snmp.pl <SWITCH IP>
Obtaining data from Switch: <SWITCH IP>
Administrator Username: [ admin ]: <USER>
Administrator Password: [ admin ]: <PASSWORD>
Current Body Checksum: <SOME HEXADECIMAL VALUE>
Current Header Check Byte: <SOME HEXADECIMAL VALUE>
SNMP is currently: DISABLED - WILL ENABLE
Both community strings are limited to 15 characters.
New read-only community string: [ public ]: <STRING RO>
New read-write community string: [ private ]: <STRING RW>
New Body Checksum: <SOME HEXADECIMAL VALUE>
New Header Check Byte: <SOME HEXADECIMAL VALUE>
End - SNMP Should be enabled.

When the above steps ends with an error. You can use the offline method. Just make a backup of your config in the GUI of the SLM2008. Thank copy the .cfg file to a linux box in my case this was Debian. Start the enable_snmp.pl script. Point to the .cfg file. The enable_snmp.pl will generate a new .cfg file.

The next step is to restore the changed config to the SLM2008 switch. Open the GUI and upgrade the configuration with the new “snmpenabled” config via Admin – Save configuration – Upgrade:

With snmpwalk you can verify if the new SNMP setup is working:

snmpwalk -c public 192.168.123.253 -v 2c

You can use Cacti to graph the switchports. In the screenshot below you see a running vMotion of a small VM:

 

Source:

https://chroot-me.in/blog/index.php/blog/35