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If the system is not able to cool down within one minute from the time the shutdown alarm is generated,
a second alarm is triggered and the system shuts down immediately to avoid damaging any component
due to overheating:
00:16:08: %SYSTEM:LP %CHMGR-0-TEMP_SHUTDOWN_WARN: Unit 0 a temperature sensor
has exceeded its critical shutdown temperature; Unit will shutdown now. Power
cycle the unit to power it on.
After the system shuts down, it is not possible to operate the console until you reload (power cycle) the
system.
NOTE: The Z9500 fan trays and power supplies always blow air from the front (I/O side) to the back
(Utility/power supply and fan side) of the switch. Ensure the air ducts are clean and that all fans
(system fans and power-supply fans) are working correctly. Ensure that there are fan alarms,
including fan-tray and power-supply fan alarms. Use the show alarms command to display alarm
information and the show environment command to display the current operational status of
power supplies and fan-tray components.
Troubleshooting Packet Loss
Use show hardware linecard commands to troubleshoot packet loss.
• show hardware linecard cpu data-plane statistics
• show hardware party-bus port {{0-7} | all} statistics
• show hardware linecard {0-2} drops unit {0-3} port {1-104}
• show hardware linecard {0-2} unit {0-3} {counters | details | port-stats
[detail] | register | execute-shell-cmd | ipmc-replication | table-dump}
• show hardware {layer2| layer3} {e.g. acl |in acl} linecard {0-2} port—set
{0-3}
• show hardware layer3 qos linecard {0-2} port—set {0-3}
• show hardware ipv6 {e.g.-acl |in-acl} linecard {0-2} port—set {0-3}
• show hardware system-flow layer2 linecard {0-2} port—set {0-3} [counters]
• clear hardware linecard {0-2} counters
• clear hardware linecard {0-2} unit {0-3} counters
• clear hardware linecard {0-2} cpu data-plane statistics
• clear hardware party-bus port {{0-7} | all} statistics
• clear hardware cp cpu {data-plane | i2c | sata-interface} statistics
• clear hardware rp cpu {data-plane | i2c | sata-interface} statistics
• clear hardware sfm sfm-unit-num counters
• clear hardware cp-switch counters
Displaying Drop Counters
To display drop counters, use the show hardware linecard drops commands.
• Identify the line card, port pipe, and port that is experiencing internal drops.
show hardware linecard {0–2} drops [unit {0–3} [port {1–104}]]
• Display drop counters.
show hardware linecard {0–2} drops unit {0–3}
Dell#show hardware linecard 2 drops
Debugging and Diagnostics
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