Users Guide

Example of
commands in dcb
buffer—
threshold mode
priority value buffer-size size pause-threshold threshold-value peak-
headroom headroom-value resume-offset threshold-value shared-threshold-
weight size
DellEMC(conf-dcb-buffer)#priority value buffer-size size pause-threshold
threshold-value peak-headroom headroom-value resume-offset threshold-
value shared-threshold-weight size
priority
Configure the priority for the PFC threshold to be allocated to the buffer space parameters.
Syntax
priority value buffer-size size pause-threshold threshold-value peak-
headroom headroom-value resume-offset threshold-value shared-threshold-
weight size
Parameters
priority Specify the priority of the queue for which the buffer space settings apply.
value Enter a number in the range of 0 to 7 to denote the priority to be allocated to the
dynamic buffer control mechanism.
buffer-size Ingress buffer size.
size Size of the ingress buffer in KB. Enter a number in the range of 0 to 9. The default
is as follows:
● 10G – 9
● 25G – 9
● 40G – 9
● 50G – 9
● 100G – 9
pause-threshold Buffer limit for pause frames to be sent.
NOTE: In addition to the specified pause-threshold value, pause frames are
sent only when the buffer usage exceeds some percentage of the shared
buffer.
threshold-value Buffer limit at which the port sends the pause to peer in KB. Enter a number in the
range of 0 to 9. The default is as follows:
● 10G – 9
● 25G – 9
● 40G – 9
● 50G – 9
● 100G – 9
peak-headroom Maximum buffer that a priority can use from the shared headroom pool buffer.
headroom-value Enter a number in the range 0 to 9. The defaults are as follows:
● 10G - 36 KB
● 25G - 76 KB
● 40G - 76 KB
● 50G - 143 KB
● 100G - 143 KB
resume-offset Buffer offset limit for stopping the transmission of pause frames.
threshold-value Buffer offset limit at which the port resumes the peer in KB. Enter a number in the
range of 0 to 512. The default is 9 KB.
shared-
threshold-weight
Buffer shared threshold weight
496 Data Center Bridging (DCB)