Administrator Guide

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, which provide information about environmental monitoring hardware
and hardware components.
Table 32. 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 Buer Statistics
.1.3.6.1.4.1.6027.3.16.1.1.4 fpPacketBuerTable View the modular packet buers details
per stack unit and the mode of allocation.
.1.3.6.1.4.1.6027.3.16.1.1.5 fpStatsPerPortTable View the forwarding plane statistics
containing the packet buer usage per
port per stack unit.
.1.3.6.1.4.1.6027.3.16.1.1.6 fpStatsPerCOSTable View the forwarding plane statistics
containing the packet buer statistics per
COS per port.
Buer Tuning
Buer tuning allows you to modify the way your switch allocates buers from its available memory and helps prevent packet drops
during a temporary burst of trac.
The application-specic integrated circuit (ASICs) implement the key functions of queuing, feature lookups, and forwarding lookups
in hardware.
Forwarding processor (FP) ASICs provide Ethernet MAC functions, queueing, and buering, as well as store feature and forwarding
tables for hardware-based lookup and forwarding decisions. 1G and 10G interfaces use dierent FPs.
You can tune buers at three locations
1. CSF — Output queues going from the CSF.
2. FP Uplink — Output queues going from the FP to the CSF IDP links.
3. Front-End Link — Output queues going from the FP to the front-end PHY.
All ports support eight queues, four for data trac and four for control trac. All eight queues are tunable.
Debugging and Diagnostics
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