With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cntpPeersRootDispersion
cntp Peers Root Dispersion
1.3.6.1.4.1.9.9.168.1.2.1.1.14
The maximum error in seconds, of the peer clock relative to the primary reference source at the root of the synchronization subnet. Only positive values greater than zero are possible.
Back to CISCO-NTP-MIB MIB page.
IPHost Network monitor allows you to monitor cntpPeersRootDispersion 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.