Users Guide

Step Task Command Command Mode
1
Enter interface conguration mode on an Ethernet port.
interface {tengigabitEthernet
slot/port |
fortygigabitEthernet slot/
port}
CONFIGURATION
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 1/1
Dell(cong-if-te-1/1)# 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 when PFC mode is disabled in a DCB map, 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.
Conguring no-drop queues is applicable only on the interfaces which do not need PFC.
Example:
Port A —> Port B
Data Center Bridging (DCB)
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