Can anyone advise how to shutdown and no shutdown a port on a cisco switch using just SNMP?
I can't find much documentation on it.
You can use the standard MIB2 for this: http://www.alvestrand.no/objectid/22.214.171.124.2.1.html
and then check the options under "SNMP MIB-2 Interfaces" The IfStatus is somewhere in there.
Then, find an application that allows you to do snmp set instructions, such as SNMPchttp://www.castlerock.com/
and assign a write community string to your devices. After doing all this, it should work!