Administrator Guide

Step Task Command Command Mode
fortygigabitEthernet slot/
port}
2
Apply the DCB map on the Ethernet port to congure it
with the PFC and ETS settings in the map; for example:
Dell# interface tengigabitEthernet 0/0
Dell(cong-if-te-0/0)# dcb-map SAN_A_dcb_map1
Repeat Steps 1 and 2 to apply a DCB map to more than one
port.
You cannot apply a DCB map on an interface that has been
already congured for PFC using thepfc priority
command or which is already congured for lossless
queues (pfc no-drop queues command).
dcb-map name
INTERFACE
Conguring PFC without a DCB Map
In a network topology that uses the default ETS bandwidth allocation (assigns equal bandwidth to each priority), you can also enable
PFC for specic dot1p-priorities on individual interfaces without using a DCB map. This type of DCB conguration is useful on
interfaces that require PFC for lossless trac, but do not transmit converged Ethernet trac.
Step Task Command Command Mode
1 Enter interface conguration mode on an Ethernet port.
interface
{tengigabitEthernet
slot/ port |
fortygigabitEthernet
slot/ port }
CONFIGURATION
2 Enable PFC on specied priorities. Range: 0-7. Default:
None.
Maximum number of lossless queues supported on an
Ethernet port: 2.
Separate priority values with a comma. Specify a priority
range with a dash, for example: pfc priority 3,5-7
1. You cannot congure PFC using the pfc
priority command on an interface on which a
DCB map has been applied or which is already
congured for lossless queues (
pfc no-drop
queues command).
pfc priority priority-
range
INTERFACE
Conguring Lossless Queues
DCB also supports the manual conguration of lossless queues on an interface after you disable PFC mode in a DCB map and apply
the map on the interface. The conguration of no-drop queues provides exibility for ports on which PFC is not needed, but lossless
trac should egress from the interface.
Lossless trac egresses out the no-drop queues. Ingress 802.1p trac from PFC-enabled peers is automatically mapped to the no-
drop egress queues.
When conguring lossless queues on a port interface, consider the following points:
• By default, no lossless queues are congured on a port.
Data Center Bridging (DCB)
33