M4250 POE control via snmp

By rule of thumb? standard MIB - POWER-ETHERNET-MIB is supported:

[SNMPSET command format]
snmpset -v 2c -c public {switch ip} { pethPsePortAdminEnable }.{ pethPsePortGroupIndex }.{ pethPsePortIndex } {integer} {value}

For pethPsePortAdminEnable, OID 1.3.6.1.2.1.105.1.1.1.3
 Set OID 1.3.6.1.2.1.105.1.1.1.3 to true(1) to enable PoE function.
 Set OID 1.3.6.1.2.1.105.1.1.1.3 to false(2) to disable PoE function.

For pethPsePortGroupIndex:
This variable uniquely identifies the group containing the port to which a power Ethernet PSE is connected. Group means box in the stack, module in a rack and the value 1 MUST be used for non-modular devices.

For pethPsePortIndex:
This variable uniquely identifies the power Ethernet PSE port within group pethPsePortGroupIndex to which the power Ethernet PSE entry is connected.