When the system detects a genuine over-temperature condition, it powers off the card. To recognize this
condition, look for the following system messages:
CHMGR-2-MAJOR_TEMP: Major alarm: chassis temperature high (temperature reaches or
exceeds threshold of
[value]C)
CHMGR-2-TEMP_SHUTDOWN_WARN: WARNING! temperature is [value]C; approaching shutdown
threshold of [value]C
To view the programmed alarm thresholds levels, including the shutdown value, use the
show alarms
threshold
command.
Example of the
show alarms threshold
Command
Dell#show alarms threshold
-- Temperature Limits (deg C) --
----------------------------------------------------------------
Minor Off Minor Major Off Major Shutdown
Unit2 55 60 75 80 85
----------------------------------------------------------------
Minor Off Minor Major Off Major Shutdown
Unit3 55 60 75 80 85
Troubleshoot an Over-temperature Condition
To troubleshoot an over-temperature condition, use the following information.
1
Use the
show environment
commands to monitor the temperature levels.
2
Check air flow through the system. Ensure that the air ducts are clean and that all fans are working
correctly.
3
After the software has determined that the temperature levels are within normal limits, you can re-power
the card safely. To bring back the line card online, use the
power-on
command in EXEC mode.
In addition, to control airflow for adequate system cooling, Dell Networking requires that you install blanks in
all slots without a line card.
NOTE:
Exercise care when removing a card; if it has exceeded the major or shutdown thresholds, the card
could be hot to the touch.
Recognize an Under-Voltage Condition
If the system detects an under-voltage condition, it sends an alarm.
To recognize this condition, look for the following system message:
%CHMGR-1-CARD_SHUTDOWN: Major
alarm: stack unit 2 down - auto-shutdown due to under voltage
.
This message indicates that the specified card is not receiving enough power. In response, the system first
shuts down Power over Ethernet (PoE). If the under-voltage condition persists, line cards are shut down, then
the RPMs.
Debugging and Diagnostics
1245
Summary of Contents for S4048T
Page 1: ...Dell Configuration Guide for the S4048T ON System 9 10 0 1 ...
Page 98: ... saveenv 7 Reload the system uBoot mode reset Management 98 ...
Page 113: ...Total CFM Pkts 10303 CCM Pkts 0 LBM Pkts 0 LTM Pkts 3 LBR Pkts 0 LTR Pkts 0 802 1ag 113 ...
Page 411: ...mode transit no disable Force10 Resilient Ring Protocol FRRP 411 ...
Page 590: ...Figure 67 Inspecting the LAG Configuration Link Aggregation Control Protocol LACP 590 ...
Page 646: ...Figure 87 Configuring Interfaces for MSDP Multicast Source Discovery Protocol MSDP 646 ...
Page 647: ...Figure 88 Configuring OSPF and BGP for MSDP Multicast Source Discovery Protocol MSDP 647 ...
Page 653: ...Figure 91 MSDP Default Peer Scenario 2 Multicast Source Discovery Protocol MSDP 653 ...
Page 654: ...Figure 92 MSDP Default Peer Scenario 3 Multicast Source Discovery Protocol MSDP 654 ...
Page 955: ...Figure 119 Single and Double Tag First byte TPID Match Service Provider Bridging 955 ...