Users Guide

buer-size Ingress buer size.
size Size of the ingress buer in KB. Enter a number in the range of 0 to 7787. The default is
45 KB.
pause-threshold Buer limit for pause frames to be sent.
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 7787. The default is 10 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 1 to 7787. The default is 10 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 9. The default shared threshold weight is 10.
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
9.8(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.
You can use the priority command to set up both the administrative and peer-related PFC priorities. For
example, you can congure the intended buer conguration for all eight priorities. If you congure the number of
lossless queues as 4 and if the administrator-congured priorities congured within the DCB input policy is applied,
then the conguration 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 eective for buer conguration. This
method of conguration provides an easy and exible technique to accommodate both administratively-congured
and peer-congured priorities.
Example
Dell(conf-dcb-buffer-thr)# priority 0 buffer-size 52 pause-threshold 16 resume-
offset 10 shared-threshold-weight 7
500 Data Center Bridging (DCB)