Dell S4810 Reference Manual page 569

ETS settings, and apply the new map to the interfaces to override the previous DCB map settings.
Then, delete the original dot1p priority-priority group mapping.
If you delete the dot1p priority-priority group mapping (no priority pgid command) before you
apply the new DCB map, the default PFC and ETS parameters are applied on the interfaces. This
change may create a DCB mismatch with peer DCB devices and interrupt network operation.
Applying a DCB Map on a Port
When you apply a DCB map with PFC enabled on an S6000 interface, a memory buffer for PFC-enabled
priority traffic is automatically allocated. The buffer size is allocated according to the number of PFC-
enabled priorities in the assigned map.
To apply a DCB map to an Ethernet port, follow these steps:
Step Task
Enter interface configuration mode on an
1
Ethernet port.
Apply the DCB map on the Ethernet port to
2
configure it with the PFC and ETS settings in
the map; for example:
Dell# interface tengigabitEthernet 0/0
Dell(config-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 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
1 Enter interface configuration mode on an
Ethernet port.
Data Center Bridging (DCB)
Command
interface
{tengigabitEthernet slot/
port |
fortygigabitEthernet
slot/port}
dcb-map name
Command
interface
{tengigabitEthernet
slot/port |
Command Mode
CONFIGURATION
INTERFACE
Command Mode
CONFIGURATION
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