Hello Suhail,
You can edit your Alarms Manager to react to the trap message and replace the them with device nickname and add syslocation and other criteria to that.
So if you start alarm manager, you have at top device up/down. You can for device down make sure it is enabled, then look at actions and Choose email or syslog, then look for Override Content. Click on that and Edit content. From there, you can click on 'show keywords' *see pic*. Here you can choose switch Nickname, or by syslocation etc.
Note Show Keywords below, and strings that can be altered in action override Email Body.
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