Service Manual
Usage Information
By applying a DCB input policy with PFC enabled, you enable PFC operation on ingress port trac. To achieve
complete lossless handling of trac, also enable PFC on all DCB egress ports or congure the dot1p priority-queue
assignment of PFC priorities to lossless queues (refer to pfc no-drop queues).
To disable PFC operation on an interface, enter the no pfc mode on command in DCB Input Policy
Conguration mode. PFC is enabled and disabled as global DCB operation is enabled (
dcb-enable) or disabled
(no dcb-enable).
You cannot enable PFC and link-level ow control at the same time on an interface.
NOTE: We do not recommended to use this command as it has been deprecated in the current 9.4(0.0)
release. A warning message appears when you try to run this command indicating that you have to use
the dcb-map commands in the future.
priority-group bandwidth pfc
Congure the ETS bandwidth allocation and PFC mode used to manage port trac in an 802.1p priority group.
Syntax
priority-group group-num {bandwidth percentage| strict-priority} pfc {on | off}
Parameters
priority-group
group-num
Enter the keyword priority-group followed by the number of an 802.1p priority
group. Use the priority-pgid command to create the priority groups in a DCB map.
bandwidth
percentage
Enter the keyword bandwidth followed by a bandwidth percentage allocated to the
priority group. The range of valid values is 1 to 100. The sum of all allocated bandwidth
percentages in priority groups in a DCB map must be 100%.
strict-priority Congure the priority-group trac to be handled with strict priority scheduling. Strict-
priority trac is serviced rst, before bandwidth allocated to other priority groups is made
available.
pfc {on | o} Congure whether priority-based ow control is enabled (on) or disabled (o) for port
trac in the priority group.
Defaults None
Command Modes DCB MAP
Command History
This guide is platform-specic. 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.
9.8(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, S6000 platforms.
Usage Information
Use the dcb-map command to congure priority groups with PFC and/or ETS settings and apply them to
Ethernet interfaces.
Use the priority-pgid command to map 802.1p priorities to a priority group. You can assign each 802.1p
priority to only one priority group. A priority group consists of 802.1p priority values that are grouped together for
Data Center Bridging (DCB) 503