With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
pxmCurrentClock
pxm Current Clock
1.3.6.1.4.1.351.110.3.16.7
This object represents the clock source currently selected for PXM card. primary(1): The primary clock source is described by pxmPrimaryMuxClockSource secondary(2): The secondary clock source is described by pxmSecondaryMuxClockSource. intOscillator(3): Current clock is internal oscillator.
Back to CISCO-MGX82XX-PXM-CLOCK-MIB MIB page.
IPHost Network monitor allows you to monitor pxmCurrentClock on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.