Reference Guide

Command
Modes
DCB MAP
Command
History
Version 9.0(1.3) Introduced on the S5000.
Usage
Information
By default, PFC is enabled on S5000 Ethernet ports and 802.1p priorities are
included in DCBx negotiation with peer PFC devices
Use the no pfc mode on command in a DCB map and apply the map to an
interface to disable PFC before you configure lossless queues on a port on which
PFC is not required. To configure lossless queues, use the
pfc no-drop queues
command
To re-enable PFC operation on an interface, open the DCB map for editing (dcb-
map command), enter the pfc mode on command, and re-apply the map on the
interface.
You cannot enable PFC and link-level flow control at the same time on an
interface.
Related
Commands
dcb-map – creates a DCB map to configure PFC and ETS parameters and apply the
PFC and ETS settings on Ethernet ports.
pfc no-drop queues
Configure the port queues that still function as no-drop queues for lossless traffic.
S5000
Syntax
pfc no-drop queues queue-range
To remove the no-drop port queues, use the no pfc no-drop queues
command.
Parameters
queue-range Enter the queue range. Separate the queue values with a
comma; specify a priority range with a dash; for example,
pfc no-drop queues 1,3 or pfc no-drop queues
2-3. The range is 0 to 3.
Defaults No lossless queues are configured.
Command
Modes
INTERFACE
Command
History
Version 9.0(1.3) Introduced on the S5000.
Usage
Information
The configuration of no-drop queues provides flexibility for ports on which PFC is
not needed but lossless traffic should egress from the interface.
The maximum number of lossless queues supported per port is two.
The default dot1p priority-queue mapping is:
416
Data Center Bridging (DCB)