Data Center Bridging: Default Configuration - Dell S4810 Reference Manual

Step Task
Apply the DCB map, created to disable the
5
PFC operation, on the interface
Configure the port queues that still function
6
as no-drop queues for lossless traffic. For
the dot1p-queue assignments.
The maximum number of lossless queues
globally supported on a port is 2.
You cannot configure PFC no-drop queues
on an interface on which a DCB map with
PFC enabled has been applied, or which is
already configured for PFC using the pfc
priority command.
Range: 0-3. Separate 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 Default: No lossless
queues are configured.

Data Center Bridging: Default Configuration

This functionality is supported on the platform.
Before you configure PFC and ETS on an S6000 switch (see
take into account the following default settings:
DCB is enabled.
PFC and ETS are globally enabled by default.
The default dot1p priority-queue assignments are applied as follows:
Dell(conf)#do show qos dot1p-queue-mapping
Dot1p Priority : 0
Queue : 2
Dell(conf)#
NOTE: In Egress queue assignment (8 queues in S6000, 4 against in S5000 / S4810.
PFC is not applied on specific dot1p priorities.
ETS: Equal bandwidth is assigned to each port queue and each dot1p priority in a priority group.
To configure PFC and ETS parameters on an S6000 interface, you must specify the PFC mode, the ETS
bandwidth allocation for a priority group, and the 802.1p priority-to-priority group mapping in a DCB
map. No default PFC and ETS settings are applied to Ethernet interfaces.
Data Center Bridging (DCB)
1 2 3 4 5 6
0 1 3 4 5 6
Command
dcb-map {name |
default}
pfc no-drop
queuesqueue-range
Configuring DCB Maps and its
7
7
Command Mode
INTERFACE
INTERFACE
Attributes),
571