Users Guide

Version Description
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.
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 68 pause-threshold 30 resume-
offset 10 shared-threshold-weight 10
dcb-policy buer-threshold (Interface Conguration)
Assign the DCB policy to the DCB buer threshold prole on interfaces. This setting takes precedence over the global buer-threshold
setting.
Syntax
dcb-policy buffer-threshold profile-name
Parameters
buer-threshold Congure the prole name for the DCB buer threshold
prole-name Enter the name of the prole, which can be a string of up to 32 characters in length.
Default None
Command Modes INTERFACE 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
9.10(0.0) Introduced on the S6100-ON.
9.8(1.0) Introduced on the Z9100–ON.
9.7(0.0) Introduced on the S6000-ON and Z9500.
9.3(0.0) Introduced on the S4810, S4820T, and S6000 platforms.
Usage Information You can congure up to a maximum of four lossless (PFC) queues. By conguring four lossless queues, you can
congure four dierent priorities and assign a particular priority to each application that your network is used to
process. For example, you can assign a higher priority for time-sensitive applications and a lower priority for other
services, such as le transfers. You can congure the amount of buer space to be allocated for each priority and
Data Center Bridging (DCB) 473