Users Guide

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 congure buer-prole global 1Q, the message displays during every bootup. Only one reboot is
required for the conguration to take eect; afterward you may ignore this bootup message.
Dell Networking OS Behavior: If you congure 1Q, save the running-cong to the startup-cong, and then delete the startup-cong and
reload the chassis. The only way to return to the default buer prole is to remove the 1Q prole congured and then reload the chassis.
If you have already applied a custom buer prole 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 congure buffer-profile global, you cannot not apply a buer prole 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 predened buer prole, use the following command.
• Apply one of the pre-dened buer proles for all port pipes in the system.
Deciding to Tune Buers
Dell Networking recommends exercising caution when conguring any non-default buer settings, as tuning can signicantly aect system
performance. The default values work for most cases.
As a guideline, consider tuning buers if trac is bursty (and coming from several interfaces). In this case:
• Reduce the dedicated buer on all queues/interfaces.
• Increase the dynamic buer on all interfaces.
• Increase the cell pointers on a queue that you are expecting will receive the largest number of packets.
To dene, change, and apply buers, use the following commands.
• Dene a buer prole for the FP queues.
CONFIGURATION mode
buffer-profile fp fsqueue
• Dene a buer prole for the CSF queues.
CONFIGURATION mode
buffer-profile csf csqueue
• Change the dedicated buers on a physical 1G interface.
BUFFER PROFILE mode
buffer dedicated
• Change the maximum number of dynamic buers an interface can request.
BUFFER PROFILE mode
buffer dynamic
• Change the number of packet-pointers per queue.
BUFFER PROFILE mode
Debugging and Diagnostics
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