Reference Guide

1080 | E-Series TeraScale Debugging and Diagnostics
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Overview
The FTOS diagnostics and debugging features are a proactive approach to maximizing system uptime and
reducing meantime to resolution (MTTR) when a problem occurs. This feature set includes a combination
of proactive and reactive components designed to alert the user to network events, automatically collect
information on the event, and allow the user to collect diagnostic information from the system.
• Proactive component
— The system health check detects, reports, and takes action on an error in real time.
— When an automatic corrective action is not appropriate, the system health check reports
the detected anomaly, in real time, via a syslog message and/or SNMP.
• Reactive component
— When an error condition is asserted, appropriate show and debug commands are available
to assist in identifying the condition as well as rapid fault isolation.
System health checks
An automatic runtime loopback test monitors the overall health status of the dataplane. This loopback test
runs while the system’s switch fabric is up; detecting potential blockages in the system’s usual data
transfer path.
Runtime dataplane loopback check
This is a dataplane loopback health check. Periodically, the primary RPM and each line card, in an online
start, sends a packet through the dataplane channels, verifying the packet is returned, and then verifying the
dataplane is functioning as expected. Both portpipes on the line cards are tested.
Figure 62-1. Dataplane Loopback
Note: These diagnostics and debugability features are available on TeraScale systems only, unless
specifically noted.