Configuring Pfc Without A Dcb Map; Configuring Lossless Queuesexample - Dell S4048–ON Configuration Manual

Step Task
Dell# interface tengigabitEthernet 1/1
Dell(config-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 configured for PFC using thepfc priority
command or which is already configured for lossless queues
(pfc no-drop queues command).

Configuring 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 specific dot1p-priorities on individual interfaces without using a DCB map. This type of DCB configuration is useful on interfaces that
require PFC for lossless traffic, but do not transmit converged Ethernet traffic.
Table 17. Configuring PFC without a DCB Map
Step Task
1 Enter interface configuration mode on an Ethernet port.
2 Enable PFC on specified 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 configure PFC using the pfc priority
command on an interface on which a DCB map has
been applied or which is already configured for lossless
queues (pfc no-drop queues command).
Configuring Lossless Queues
DCB also supports the manual configuration of lossless queues on an interface when PFC mode is disabled in a DCB map, apply the map on
the interface. The configuration of no-drop queues provides flexibility for ports on which PFC is not needed, but lossless traffic should
egress from the interface.
Configuring no-drop queues is applicable only on the interfaces which do not need PFC.
Example:
Port A —> Port B
Port C —> Port B
PFC no-drop queues are configured for queues 1, 2 on Port B. PFC capability is enabled on priorities 3, 4 on PORT A and C.
262 Data Center Bridging (DCB)
Command
Command
interface {tengigabitEthernet
slot/port [/subport] |
fortygigabitEthernet slot/port}
pfc priority priority-
range
Command Mode
Command Mode
CONFIGURATION
INTERFACE