proc StopProtocol { protocol } {
    # Stop a protocol on all the ports that has the protocol enabled
    set root [ixNet getRoot]

    foreach vport [ixNet getList $root vport] {
	set port [ixNet getAttribute $vport -assignedTo]
	if {[ixNet getAttribute $vport/protocols/[string tolower $protocol] -enabled] == "true"} {
	    catch {ixNet exec stop $vport/protocols/[string tolower $protocol]} errMsg
	    if {$errMsg != "::ixNet::OK"} {
		puts "Error: Failed to stop $protocol on port $port"
	    } else {
		puts "Stopped $protocol on port $port"
	    }
	}
    }
}