Setup Guide

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
size Weightage of the priorities on the shared buffer size in the system. Enter a number
in the range of 0 to 11. The default shared threshold weight is 11.
Command Modes DCB-BUFFER-THRESHOLD mode
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
Version Description
9.11(2.0P0) Default values of buffer threshold profile parameters are changed for the Z9100-
ON and S6100-ON.
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S6100.
9.8(1.0) Introduced on the Z9100–ON.
9.8(0.0) Introduced on the S3048-ON and S4048-ON.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.0) Introduced on the S4810, S4820T, and S6000 platforms.
Usage
Information
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. 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.
494 Data Center Bridging (DCB)