Dell 9.7(0.0) manual Size

Default

Command Modes

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Usage Information

size	Size of the ingress buffer in KB. Enter a number in the range
	of 0 to 7787. The default is 45 KB.
pause-	Buffer limit for pause frames to be sent
threshold
threshold-	Buffer limit at which the port sends the pause to peer in KB.
value	Enter a number in the range of 0 to 7787. The default is 10
	KB.
resume-offset	Buffer offset limit for resuming in KB
threshold-	Buffer offset limit at which the port resumes the peer in KB.
value	Enter a number in the range of 1 to 7787. The default is 10
	KB.
shared-	Buffer shared threshold weight
threshold-
weight
size	Weightage of the priorities on the shared buffer size in the
	system. Enter a number in the range of 0 to 9. The default
	shared threshold weight is 10.

The default size of the ingress buffer is 45 KB. The default buffer limit at which the port sends the pause to peer and recommences the sending of packets to the peer is 10 KB. The default threshold weight of the shared buffer space is 10.

DCB-BUFFER-THRESHOLD mode

Version	Description
9.7(0.0)	Introduced on the S6000-ON.
9.3(0.0)	Introduced on the S4810, S4820T, S6000, and MXL
	platforms.

You must apply this buffer policy at the interface level for the attributes to be applicable in conjunction with the DCB input policy.

For each QoS policy buffer, 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. When PFC detects congestion on a queue for a specified priority, it sends a pause frame for the 802.1p priority traffic to the transmitting device.

You can use set up both the administrative and peer-related PFC priorities. For example, you can configure the intended buffer configuration for all 8 priorities. If you configure the number of lossless queues as 4 and if the administrator- configured priorities configured within the DCB input policy is applied, then the configuration for those priorities are pre-designed. However, if the peer-provided priorities are applied, although a DCB input policy is present, the peer-provided priorities become effective for buffer configuration. This method of configuration

508 Data Center Bridging (DCB)