Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 317
Configuring the Dynamic Buffer Method, Con the profile name for the DCB buffer threshold
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Configuring the Dynamic Buffer Method Priority-based flow control using dynamic buffer spaces is supported on the switch. To configure the dynamic buffer capability, perform the following steps: 1. Enable the DCB application. By default, DCB is enabled and link-level flow control is disabled on all interfaces. CONFIGURATION mode dcb enable 2. Configure the shared PFC buffer size and the total buffer size. A maximum of 4 lossless queues are supported. CONFIGURATION mode dcb pfc-shared-buffer-size 2000 dcb pfc-total-buffer-size 5000 3. Configure the number of PFC queues. CONFIGURATION mode dcb enable pfc-queues pfc-queues The number of ports supported based on lossless queues configured will depend on the buffer. The default number of PFC queues in the system is two. For each priority, you can specify the shared buffer threshold limit, the ingress buffer size, buffer limit for pausing the acceptance of packets, and the buffer offset limit for resuming the acceptance of received packets. 4. Configure the profile name for the DCB buffer threshold CONFIGURATION mode dcb-buffer-threshold dcb-buffer-threshold 5. DCB-BUFFER-THRESHOLD mode priority 0 buffer-size 52 pause-threshold 16 resume-offset 10 sharedthreshold-weight 7 6. Assign the DCB policy to the DCB buffer threshold profile on the backplane. CONFIGURATION mode dcb-policy buffer-threshold linecard {linecard-number | all} port-set {portpipe | all} backplane all dcb-policy-name 7. Assign the DCB policy to the DCB buffer threshold profile on interfaces. This setting takes precedence over the default buffer-threshold setting. INTERFACE mode (conf-if-te) dcb-policy buffer-threshold buffer-threshold 8. Configuring Global total buffer size on linecards. CONFIGURATION mode Data Center Bridging (DCB) 317
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