Users Guide

Figure 158. Buffer Tuning Points
Deciding to Tune Buffers
Dell Networking recommends exercising caution when configuring any non-default buffer settings, as tuning can significantly affect
system performance. The default values work for most cases.
As a guideline, consider tuning buffers if traffic is bursty (and coming from several interfaces). In this case:
• Reduce the dedicated buffer on all queues/interfaces.
• Increase the dynamic buffer on all interfaces.
• Increase the cell pointers on a queue that you are expecting will receive the largest number of packets.
To define, change, and apply buffers, use the following commands.
• Define a buffer profile for the FP queues.
CONFIGURATION mode
buffer-profile fp fsqueue
• Define a buffer profile for the CSF queues.
CONFIGURATION mode
buffer-profile csf csqueue
• Change the dedicated buffers on a physical 1G interface.
BUFFER PROFILE mode
buffer dedicated
• Change the maximum number of dynamic buffers an interface can request.
BUFFER PROFILE mode
buffer dynamic
• Change the number of packet-pointers per queue.
BUFFER PROFILE mode
buffer packet-pointers
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Debugging and Diagnostics