1198 | E-Series TeraScale Debugging and Diagnosticsw w w . d e l l . c o m | s u p p o r t . d e l l . c o m • Write the contents of the trace buffer on page 1216• Recognize a high CPU condition on page 1217• Configure an action upon a hardware error on page 1217• Core dumps on page 1218OverviewThe FTOS diagnostics and debugging features are a proactive approach to maximizing system uptime andreducing meantime to resolution (MTTR) when a problem occurs. This feature set includes a combinationof proactive and reactive components designed to alert the user to network events, automatically collectinformation 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 thedetected 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 assistin identifying the condition as well as rapid fault isolation.System health checksAn automatic runtime loopback test monitors the overall health status of the dataplane. This loopback testruns while the system’s switch fabric is up; detecting potential blockages in the system’s usual data transferpath.Runtime dataplane loopback checkThis is a dataplane loopback health check. Periodically, the primary RPM and each line card, in an onlinestart, sends a packet through the dataplane channels, verifying the packet is returned, and then verifying thedataplane is functioning as expected (see Figure 61-1). Both portpipes on the line cards are tested.Note: These diagnostics and debugability features are available on TeraScale systems only, unlessspecifically noted.
