Users Guide

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. The maximum number of priority
groups is 3.
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.
• On the C9010, DCB is supported per-line card. If the traffic handled by a DCB map is transmitted on
ports on different line cards, you must manually configure the DCB map on the backplane ports of the
C9010 line cards on which the ports reside (dcb-map linecard all backplane all command).
If the DCB map you apply to the backplane ports of C9010 RPMs (linecard 10–11) configures two
or more priority groups, you must increase the size of the PFC shared and total buffers (dcb pfc-
shared-buffer-size and dcb pfc-total-buffer-size commands).
Applying a DCB Map on a Port
When you apply a DCB map with PFC enabled on a switch 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:
Table 15. Applying a DCB map to an Ethernet port
Step Task Command Command Mode
1
Enter interface configuration mode
on an Ethernet port.
interface
{tengigabitEthernet
slot/port
fortygigabitEthernet
slot/port}
CONFIGURATION
2
Apply the DCB map on the Ethernet
port to configure it with the PFC and
ETS settings in the map; for example:
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).
dcb-map name
INTERFACE
280
Data Center Bridging (DCB)