how do we create snmp community strings?

A community string is just that - a string of characters!  Do you mean how the strings are configured on a specific device, as the configuration steps are different depending on the device you are working with?  There is also the question on which version to use.

Could you give a bit more details on what you are looking to achieve?

in defining a node there i a part wherein we will input the read/write community string:____________

what do we usually input in there?

certainly i nee to know how the strings are configured on a specific device

is the strings are configured on a specific device = enabling SNMP ??

thanks

The strings are configured in different places, depending on the device.  If the device has a web config portal, it will be setup somewhere there, or on a cisco device for example, it is configured in the cli.

What is the specific device you are working with?

what will i input in the read/write community string:____________ ??

my device is an IBM server

The sting you choose is up to you.  The defaults are usually PUBIC and PRIVATE, but these should be changed.  The only criteria is they match at both ends

yeah.. the default is public in the field of community strings.

but after that there is a read/write community string which im confused what to put-in.

Unless you need write access over SNMP (probably unlikely as you would know if you did) so just leave it blank...

ahh i see.. but when i click the "test" button it fails..

Have you configured a matching string on the device?  You say the device is an IBM Server.  Is this a windows server?

what is a matching string on the device? and how do we do that?

yes it is windows server.