With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cncNcdpHealth
Cisco Network Clock Ncdp Health
1.3.6.1.4.1.9.9.121.1.4.1.1.5
The health of the clock source associated with this row.
Back to CISCO-ATM-NETWORK-CLOCK-MIB MIB page.
IPHost Network monitor allows you to monitor cncNcdpHealth on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.