With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cntpFilterPeersDispersion
cntp Filter Peers Dispersion
1.3.6.1.4.1.9.9.168.1.3.2.1.4
The maximum error of the peer clock relative to the local clock over the network path between them, in seconds. Only positive values greater than zero are possible.
Back to CISCO-NTP-MIB MIB page.
IPHost Network monitor allows you to monitor cntpFilterPeersDispersion on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.