Using A Pre-Defined Buffer Profile; Sample Buffer Profile Configuration - Dell S4820T Configuration Manual

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Using a Pre-Defined Buffer Profile

Dell Networking OS provides two pre-defined 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 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 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 pre-defined 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 Networking OS displays an error message instructing
you to remove the default configuration using the no buffer-profile global command.

Sample Buffer Profile Configuration

The two general types of network environments are sustained data transfers and voice/data.
Dell Networking recommends a single-queue approach for data transfers.
Example of a Single Queue Application with Default Packet Pointers
!
buffer-profile fp fsqueue-fp
buffer dedicated queue0 3 queue1 3 queue2 3 queue3 3 queue4 3 queue5 3 queue6 3
queue7 3
buffer dynamic 1256
!
buffer-profile fp fsqueue-hig
buffer dedicated queue0 3 queue1 3 queue2 3 queue3 3 queue4 3 queue5 3 queue6
3 queue7 3
buffer dynamic 1256
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