Users Guide

NOTE: In addition to the specied pause-threshold value, pause frames are
sent only when the buer usage exceeds some percentage of the shared
buer.
threshold-value Buer 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 buer that a priority can use from the shared headroom pool buer.
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-oset Buer oset limit for stopping the transmission of pause frames.
threshold-value Buer oset 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
Buer shared threshold weight
size Weightage of the priorities on the shared buer 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-specic. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
Version Description
9.11(2.0P0) Default values of buer threshold prole parameters are changed for the Z9100-ON and
S6100-ON.
9.10(0.0) Introduced on the S6100.
9.8(1.0) Introduced on the Z9100–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 buer threshold limit, the ingress buer size, buer limit for pausing
the acceptance of packets, and the buer oset limit for resuming the acceptance of received packets. When PFC
detects congestion on a queue for a specied priority, it sends a pause frame for the 802.1p priority trac to the
transmitting device.
Data Center Bridging (DCB) 503