Deployment Guide

Version Description
9.3(0.0) Introduced on the S4810, S4820T, and S6000.
Usage
Information
When you enter the profile name, you enter the DCB buffer threshold configuration mode. 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.
Example
DellEMC(conf)#dcb-buffer—threshold test
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
496 Data Center Bridging (DCB)