Reference Guide

You can congure dynamic buers per port on both 1G and 10G FPs and per queue on CSFs. By default, the FP dynamic buer
allocation is 10 times oversubscribed. For the 48-port 1G card:
• Dynamic Pool= Total Available Pool(16384 cells) — Total Dedicated Pool = 5904 cells
• Oversubscription ratio = 10
• Dynamic Cell Limit Per port = 59040/29 = 2036 cells
Figure 31. Buer Tuning Points
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
Debugging and Diagnostics
243