Addendum

Step Task Command Command Mode
1 Enter INTERFACE Configuration mode. interface
{tengigabitEthernet
slot/port |
fortygigabitEthernet
slot/port}
CONFIGURATION
2
Open a DCB map and enter DCB map
configuration mode.
dcb-map name INTERFACE
3
Disable PFC. no pfc mode on DCB MAP
4
Return to interface configuration mode. exit DCB MAP
5
Apply the DCB map created to disable PFC
operation on the interface
dcb-map {name |
default}
INTERFACE
6
Configure the port queues that still function
as no-drop queues for lossless traffic. For
the dot1p-queue assignments, see Table 131.
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.
pfc no-drop queues
queue-range
INTERFACE
Data Center Bridging: Default Configuration
This functionality is supported on the S6000 platform.
Before you configure PFC and ETS on an S5000 switch (see Configuring DCB Maps and its Attributes),
take into account the following default settings:
DCB is enabled (see Enabling Data Center Bridging).
The PFC memory buffer supports up to 64 PFC-enabled ports and two lossless queues per port.
PFC and ETS are globally enabled by default:
The default dot1p priority-queue assignments are applied as follows:
802.1p value in incoming frame: 0 1 2 3 4 5 6 7
Egress queue assignment 0 0 0 1 2 3 3 3
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 S5000 interface, you must specify a PFC mode and ETS
bandwidth allocation for a priority group and an 802.1p priority-to-priority group mapping in a DCB map
(see Configuring PFC and ETS in a DCB Map). No default PFC and ETS settings are applied to Ethernet
interfaces.
90
Data Center Bridging (DCB)