Administrator Guide
dcb-map name
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 the
pfc 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.
1 Enter interface configuration mode on an Ethernet port.
CONFIGURATION mode
interface tengigabitEthernet slot/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.
INTERFACE mode
pfc priority priority-range
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 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.
When configuring lossless queues on a port interface, consider the following points:
• By default, no lossless queues are configured on a port.
• A limit of two lossless queues are supported on a port. If the number of lossless queues configured
exceeds the maximum supported limit per port (two), an error message is displayed. You must re-
configure the value to a smaller number of queues.
• If you configure lossless queues on an interface that already has a DCB map with PFC enabled (pfc on),
an error message is displayed.
1 Enter INTERFACE Configuration mode.
CONFIGURATION mode
FC Flex IO Modules 1060