Administrator Guide

Version Description
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.
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
486 Data Center Bridging (DCB)