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As a result, PFC and lossless port queues are disabled on 802.1p priorities, and all priorities are mapped to the same priority
queue and equally share port bandwidth.
● To change the ETS bandwidth allocation configured for a priority group in a DCB map, do not modify the existing DCB
map configuration. Instead, create a new DCB map with the desired PFC and ETS settings, and apply the new map to the
interfaces to override the previous DCB map settings. Then, delete the original dot1p priority-to-priority group mapping.
If you delete the dot1p priority-to-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 the network operation.
Applying a DCB Map on Server-facing Ethernet Ports
You can apply a DCB map only on a physical Ethernet interface and can apply only one DCB map per interface.
1. Enter CONFIGURATION mode on a server-facing port or port channel to apply a DCB map.
You cannot apply a DCB map on a port channel. However, you can apply a DCB map on the ports that are members of the
port channel.
CONFIGURATION mode
interface tengigabitEthernet slot/port
2. Apply the DCB map on an Ethernet port or port channel. The port is configured with the PFC and ETS settings in the DCB
map.
Repeat this step to apply a DCB map to more than one port or port channel.
INTERFACE mode
dcb-map name
Dell# interface tengigabitEthernet 0/0
Dell(config-if-te-0/0)# dcb-map SAN_DCB1
Creating an FCoE VLAN
Create a dedicated VLAN to send and receive Fibre Channel traffic over FCoE links between servers and a fabric over an NPG.
The NPG receives FCoE traffic and forwards decapsulated FC frames over FC links to SAN switches in a specified fabric.
1. Create the dedicated VLAN for FCoE traffic. Range: 2–4094.
VLAN 1002 is commonly used to transmit FCoE traffic.
CONFIGURATION mode
interface vlan vlan-id
When you apply an FCoE map to an Ethernet port (Applying an FCoE map on server-facing Ethernet ports), the port is
automatically configured as a tagged member of the FCoE VLAN.
Creating an FCoE Map
An FCoE map consists of:
● An association between the dedicated VLAN, used to carry FCoE traffic, and the SAN fabric where the storage arrays are
installed. Use a separate FCoE VLAN for each fabric to which the FCoE traffic is forwarded. Any non-FCoE traffic sent on a
dedicated FCoE VLAN is dropped.
● The FC-MAP value, used to generate the fabric-provided MAC address (FPMA). The FPMA is used by servers to transmit
FCoE traffic to the fabric. You can associate an FC-MAP with only one FCoE VLAN and conversely, associate an FCoE VLAN
with only one FC-MAP.
● FCF priority, the priority used by a server CNA to select an upstream FCoE forwarder (FCF)
● FIP keepalive (FKA) advertisement timeout
FC Flex IO Modules
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