CISCO-MGX82XX-PXM-CLOCK-MIB

Description: Manages PXM clock source configuration and synchronization timing on Cisco MGX 8200 WAN switch chassis.

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CISCO-MGX82XX-PXM-CLOCK-MIB manages clock source configuration and synchronization timing for the PXM (Processor Switching Module) card in Cisco MGX 8200-series WAN switches, a legacy ATM/Frame Relay wide-area switching platform. It exposes primary and secondary clock source selection (inband line, external, or SM-slot derived), the external clock connector type and impedance, stratum level, and objects tracking the current versus previous active clock source. This is a hardware status and configuration MIB focused on timing synchronization health: monitoring pxmCurrentClock against pxmPreviousClock reveals whether the chassis has failed over to its secondary/backup clock source, a sign of a primary timing reference failure that can cause network-wide synchronization slips. It is a Cisco-proprietary extension specific to the MGX 8200 chassis architecture and does not depend on external standard timing MIBs. It is deployed in carrier/service-provider WAN environments using MGX 8200 switches for ATM/Frame Relay aggregation where clock stratum accuracy is operationally critical, making CISCO-MGX82XX-PXM-CLOCK-MIB SNMP monitoring essential for catching a clock-source failover before it causes synchronization slips.

An operator would poll pxmCurrentClock and compare it to pxmPreviousClock to detect an unplanned failover from the primary to secondary clock source, then check pxmPrimaryMuxClockSource and pxmSecondaryMuxClockSource to confirm which sources are configured. pxmExtClockPresent and pxmClkStratumLevel help verify whether an external stratum reference is actually present and at the expected accuracy level, flagging a timing degradation before it causes downstream frame slips.

SNMP MIB for managing clock and timing synchronization on the Processor Switching Module (PXM) cards in Cisco MGX 8200 series WAN switches, enabling monitoring of clock-related parameters and synchronization status.