Administrator Guide

You can use the priority command to set up both the administrative and peer-related PFC priorities.
For example, you can configure the intended buffer configuration for all eight priorities. If you configure
the number of lossless queues as 4 and if the administrator-configured priorities configured within the
DCB input policy is applied, then the configuration 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 effective for buffer configuration. This method of configuration provides an easy and flexible
technique to accommodate both administratively-configured and peer-configured priorities.
Example
DellEMC(conf-dcb-buffer-thr)# priority 0 buffer-size 68 pause-threshold 30
resume-offset 10 shared-threshold-weight 10
dcb-policy buffer-threshold (Interface Configuration)
Assign the DCB policy to the DCB buffer threshold profile on interfaces. This setting takes precedence over the global
buffer-threshold setting.
Syntax
dcb-policy buffer-threshold profile-name
Parameters
buffer-threshold Configure the profile name for the DCB buffer threshold
profile-name Enter the name of the profile, which can be a string of up to 32 characters in
length.
Default None
Command Modes INTERFACE 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
9.10(0.1) Introduced on the S6010-ON and S4048T-ON.
9.10(0.0) Introduced on the S6100-ON.
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 and Z9500.
9.3(0.0) Introduced on the S4810, S4820T, and S6000 platforms.
Usage
Information
You can configure up to a maximum of four lossless (PFC) queues. By configuring four lossless queues,
you can configure four different 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 file transfers. You can configure the amount of buffer
space to be allocated for each priority and the pause or resume thresholds for the buffer. This method of
configuration enables you to effectively manage and administer the behavior of lossless queues.
Example
DellEMC(conf-if-te-1/1/1)# dcb-policy buffer-threshold testDellEMC(conf-if-
tf-1/1)# dcb-policy buffer-threshold test
dcb pfc-total-buffer-size
Configure the total buffer size for PFC in kilobytes.
Syntax
dcb pfc-total—buffer—size buffer-size
Parameters
buffer-size Enter a number in the range of 0 to 3399.
Default The default is 2656KB.
Data Center Bridging (DCB) 495