With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cddServerPortNum
Cisco Distributed Director Server Port Number
1.3.6.1.4.1.9.9.197.1.3.2.1.1
The service port number of the server.
Back to CISCO-DIST-DIRECTOR-MIB MIB page.
IPHost Network monitor allows you to monitor cddServerPortNum on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.