DELL 9.7(0.0) User Manual

Step

Task

Command

Command Mode

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.

Step

Task

Command

Command Mode

1

Enter interface configuration mode on an 

Ethernet port.

interface 
{tengigabitEthernet slot/
port | 
fortygigabitEthernet 
slot/port}

CONFIGURATION

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).

pfc priority 
priority-range

INTERFACE

Configuring Lossless Queues

DCB also supports the manual configuration of lossless queues on an interface after you disable PFC 
mode in a DCB map and 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.

Lossless traffic egresses out the no-drop queues. Ingress 802.1p traffic from PFC-enabled peers is 
automatically mapped to the no-drop egress queues.

Data Center Bridging (DCB)

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