With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ntpAuthenticationTrustedMode
ntp Authentication Trusted Mode
1.3.6.1.4.1.9.5.1.15.11.1.3
ntpAuthenticationSecretKey is trusted or untrusted. Setting a ntpAuthenticationSecretKey to trusted(1) allows authentication on NTP packets containing this key, and setting a ntpAuthenticationSecretKey to untrusted(2) drops all NTP packets containing this key.
Back to CISCO-STACK-MIB MIB page.
IPHost Network monitor allows you to monitor ntpAuthenticationTrustedMode 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.