Reference Guide

Debugging and Diagnostics | 257
The simple network management protocol (SNMP) traps and OIDs in Table 22-3 provide information
about environmental monitoring hardware and hardware components.
Buffer Tuning
Buffer tuning allows you to modify the way your switch allocates buffers from its available memory and
helps prevent packet drops during a temporary burst of traffic. The application-specific integrated circuit
(ASICs) implement the key functions of queuing, feature lookups, and forwarding lookups in the
hardware.
• Forwarding processor (FP) ASICs provide Ethernet MAC functions, queueing and buffering, as well
as store feature and forwarding tables for hardware-based lookup and forwarding decisions. 10G and
40G interfaces use different FPs.
You can tune buffers at three locations (Figure 22-9).
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.
Table 22-3. 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 to display 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 to display the transmitting power of the
connected optics.
Temperature
.1.3.6.1.4.1.6027.3.10.1.2.5.1.7 chSysPortXfpRecvTemp OID to display the Temperature of the connected
optics.
Note: These OIDs are only generated if you enable
the CLI enable optic-info-update-interval is enabled
command.
Hardware MIB Buffer Statistics
.1.3.6.1.4.1.6027.3.16.1.1.4 fpPacketBufferTable View the modular packet buffers 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 buffer 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 buffer statistics per COS per port.