With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cPtpClockPortTable
Cisco Ptp Clock Port Table
1.3.6.1.4.1.9.9.760.1.2.7
Table of information about the clock ports for a particular domain.
Back to CISCO-PTP-MIB MIB page.
IPHost Network monitor allows you to monitor cPtpClockPortTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.