Describes the fault detection, recovery, and diagnostic features of Cisco 8000 Series Routers, including fabric link management for uncorrectable errors, configurable fault recovery attempts, periodic shutdown syslog messages, and procedures for viewing machine check error details.
This chapter describes the fault detection, recovery, and diagnostic features on Cisco 8000 Series Routers, and the procedures used to monitor fabric links, control fault recovery attempts, and view machine check error details.
Fabric link management for uncorrectable errors
Describes how the router uses Forward Error Correction (FEC) to detect uncorrectable errors on fabric links, retune noisy links, and permanently shuts down a link after repeated failures.
Fault recovery handling
Describes how the hw-module fault-recovery command sets the number of recovery attempts the router makes before permanently shutting down a faulty card.
Periodic syslog messages for shutdowns due to fault-recovery failures
Describes the periodic syslog messages the router generates when a card is shut down because of repeated fault-recovery failures, which repeat every 60 minutes until the operator manually recovers the card.
Machine check error notifications
Describes how the router logs machine check errors to the MCE log file and emits syslog messages with error details so that an operator can identify and act on hardware-detected processor faults.