Service Manual

Command
History
Version Description
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
PFC and ETS settings are not pre-configured on Ethernet ports. You must use the dcb-map command to
configure different groups of 802.1p priorities with PFC and ETS settings.
Using the priority-pgid command, you assign each 802.1p priority to one priority group. A priority
group consists of 802.1p priority values that are grouped together for similar bandwidth allocation and
scheduling, and that share latency and loss requirements. All 802.1p priorities mapped to the same queue
must be in the same priority group. For example, the priority-pgid 0 0 0 1 2 4 4 4 command
creates the following groups of 802.1p priority traffic:
● Priority group 0 contains traffic with dot1p priorities 0, 1, and 2.
● Priority group 1 contains traffic with dot1p priority 3.
● Priority group 2 contains traffic with dot1p priority 4.
● Priority group 4 contains traffic with dot1p priority 5, 6, and 7.
To remove a priority-pgid configuration from a DCB map, enter the no priority-pgid command.
pfc mode on
Enable the PFC configuration on the port so that the priorities are included in DCBX negotiation with peer PFC devices.
Syntax
pfc mode on
To disable the PFC configuration, use the no pfc mode on command.
Defaults PFC mode is on.
Command Modes DCB MAP
Command
History
Version Description
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 MXL 10/40GbE Switch with the FC Flex IO module.
Usage
Information
By applying a DCB input policy with PFC enabled, you enable PFC operation on ingress port traffic. To
achieve complete lossless handling of traffic, also enable PFC on all DCB egress ports or configure 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
Configuration 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 flow control at the same time on an interface.
NOTE: Please note that Dell Networking does 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.
470 Data Center Bridging (DCB)