I believe that you can do this.
However I have not used this option myself.
You need to select the device, then the edit gear on the right, then under ports is polling options.
See the screenshot.
From: observium [mailto:observium-bounces@observium.org]
On Behalf Of Bogdan Ghita
Sent: 01 November 2013 16:49
To: observium@observium.org
Subject: [Observium] control device ports via SNMP
Hello
I've been looking through the features of Observium but couldn't find out whether it includes functionality to disable or enable individual ports on a (monitored) switch/router via SNMP. I understand that this lies outside the scope of the software, but I thought I'd ask just in case it's there (or can be enabled optionally) and I missed it. If it isn't, could anybody recommend a management/monitoring software able to provide this?
Best regards
Bogdan