Connectivity Guide

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 EMC 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.
Troubleshoot an Under-Voltage Condition
To troubleshoot an under-voltage condition, check that the correct number of power supplies are installed and their Status light
emitting diodes (LEDs) are lit.
The following table lists information for SNMP traps and OIDs on the environmental monitoring hardware and hardware
components.
Table 133. SNMP Traps and OIDs
OID String OID Name Description
Receiving Power
.1.3.6.1.4.1.6027.3.10.1.2.5.1.6 chSysPortXfpRecvPower OID displays the receiving power of the
connected optics.
Transmitting power
.1.3.6.1.4.1.6027.3.10.1.2.5.1.8 chSysPortXfpTxPower OID displays the transmitting power of
the connected optics.
Temperature
.1.3.6.1.4.1.6027.3.10.1.2.5.1.7 chSysPortXfpRecvTemp OID displays the temperature of the
connected optics.
NOTE: These OIDs only generate
if you enable the enable
optic-info-update-interval
is enabled command.
Hardware MIB Buffer Statistics
.1.3.6.1.4.1.6027.3.27.1.4 dellNetFpPacketBufferTable View the modular packet buffers details
per stack unit and the mode of
allocation.
.1.3.6.1.4.1.6027.3.27.1.5 dellNetFpStatsPerPortTable View the forwarding plane statistics
containing the packet buffer usage per
port per stack unit.
.1.3.6.1.4.1.6027.3.27.1.6 dellNetFpStatsPerCOSTable View the forwarding plane statistics
containing the packet buffer statistics
per COS per port.
1124 Debugging and Diagnostics