White Papers

Table 143. SNMP Traps and OIDs (continued)
OID String OID Name Description
.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.
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.
Using a PreDefined Buffer Profile
Dell EMC Networking OS provides two predefined buffer profiles, one for single-queue (for example, non-quality-of-service
[QoS]) applications, and one for four-queue (for example, QoS) applications.
You must reload the system for the global buffer profile to take effect, a message similar to the following displays: % Info:
For the global pre-defined buffer profile to take effect, please save the config and reload
the system..
Dell EMC Networking OS Behavior: After you configure buffer-profile global 1Q, the message displays during every bootup.
Only one reboot is required for the configuration to take effect; afterward you may ignore this bootup message.
Dell EMC Networking OS Behavior: If you configure 1Q, save the running-config to the startup-config, and then delete
the startup-config and reload the chassis. The only way to return to the default buffer profile is to remove the 1Q profile
configured and then reload the chassis.
If you have already applied a custom buffer profile on an interface, the buffer-profile global command fails and a
message similar to the following displays: % Error: User-defined buffer profile already applied. Failed
to apply global pre-defined buffer profile. Please remove all user-defined buffer profiles.
Similarly, when you configure buffer-profile global, you cannot not apply a buffer profile on any single interface. A
message similar to the following displays: % Error: Global pre-defined buffer profile already applied.
Failed to apply user-defined buffer profile on interface Te 1/1. Please remove global pre-
defined buffer profile.
To apply a predefined buffer profile, use the following command:
● Apply one of the predefined buffer profiles for all port pipes in the system.
CONFIGURATION mode
buffer-profile global [1Q|4Q]
If the default buffer profile dynamic is active, Dell EMC Networking OS displays an error message instructing you to remove
the default configuration using the no buffer-profile global command.
Troubleshooting Packet Loss
The show hardware stack-unit command is intended primarily to troubleshoot packet loss.
To troubleshoot packet loss, use the following commands.
● show hardware stack-unit stack-unit-number cpu data-plane statistics
● show hardware stack-unit stack-unit-number cpu party-bus statistics
● show hardware stack-unit stack-unit-number drops unit unit-number
● show hardware stack-unit stack-unit-number unit unit-number {counters | details | port-
stats [detail] | register | ipmc-replication | table-dump}
Debugging and Diagnostics
1099