1190 | C-Series Debugging and Diagnosticsw w w . d e l l . c o m | s u p p o r t . d e l l . c o m • Available packet pointers (2k per interface). Each packet is managed in the buffer using a uniquepacket pointer. Thus, each interface can manage up to 2k packets.You can configure dynamic buffers per port on both 1G and 10G FPs and per queue on CSFs. By default,the FP dynamic buffer allocation is 10 times oversubscribed. For 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 cellsFigure 60-18. Buffer Tuning PointsWhen to tune buffersDell Force10 recommends exercising caution when configuring any non-default buffer settings, as tuningcan significantly affect system performance. The default values work for most cases.As a guideline, consider tuning buffers if traffic is very bursty (and coming from several interfaces). In thiscase:• 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.CSF Unit 3FP Unit 1PHY PHY123IDP Switch LinksFront-end Links
