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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 de-capsulated FC frames over FC links to SAN switches in a specified fabric.
Create the dedicated VLAN for FCoE traffic.
CONFIGURATION mode
interface vlan vlan-id
NOTE: VLAN 1002 is commonly used to transmit FCoE traffic.
When you apply an FCoE map to an Ethernet port, the port automatically configures as a tagged member of the FCoE VLAN.
For more information, refer to Applying a DCB Map on Server-Facing Ethernet Ports.
FCoE Maps
To identify the SAN fabric to which FCoE storage traffic is sent, use an FCoE map.
Using an FCoE map, an NPG operates as an FCoE-FC bridge between an FC SAN and FCoE network by providing FCoE-enabled
servers and switches with the necessary parameters to log in to a SAN fabric.
An FCoE map applies the following parameters on server-facing Ethernet and fabric-facing FC ports:
● The dedicated FCoE VLAN used to transport FCoE storage traffic.
● The FC-MAP value used to generate a fabric-provided MAC address.
● The association between the FCoE VLAN ID and FC fabric ID where the desired storage arrays are installed. Each Fibre
Channel fabric serves as an isolated SAN topology within the same physical network.
● A server uses the priority to select an upstream FCoE forwarder (FCF priority).
● FIP keepalive (FKA) advertisement timeout.
NOTE:
In each FCoE map, the fabric ID, FC-MAP value, and FCoE VLAN must be unique. To access one SAN fabric, use
one FCoE map. You cannot use the same FCoE map to access different fabrics.
When you configure an S5000 as an NPG, FCoE transit with FIP snooping is automatically enabled and configured using the
parameters in the FCoE map applied to server-facing Ethernet and fabric-facing FC interfaces (refer to FIP Snooping on an
NPIV Proxy Gateway).
After you apply an FCoE map on an FC port, when you enable the port (using the no shutdown command), the NPG starts
sending FIP multicast advertisements on behalf of the FC port to downstream servers to advertise the availability of a new FCF
port on the FCoE VLAN. The FIP advertisement also contains a keepalive message to maintain connectivity between a SAN
fabric and downstream servers.
Applying an FCoE Map on Server-Facing Ethernet Ports
You can apply multiple FCoE maps on an Ethernet port or port channel.
When you apply an FCoE map on a server-facing port or port channel:
● The port is configured to operate in hybrid mode (accept both tagged and untagged VLAN frames).
● The associated FCoE VLAN is enabled on the port or port channel.
When you enable a server-facing Ethernet port, the servers respond to the FIP advertisements by performing FLOGIs on
upstream virtualized FCF ports. The NPG forwards the FLOGIs as fabric discovery (FDISC) messages to a SAN switch.
1. Configure a server-facing Ethernet port or port channel with an FCoE map.
CONFIGURATION mode
interface {tengigabitEthernet slot/port | fortygigabitEthernet slot/port | port-channel
num}
2. Apply the FCoE/FC configuration in an FCoE map on the Ethernet port.
INTERFACE mode or INTERFACE PORT_CHANNEL mode
fcoe-map map-name
Repeat this step to apply an FCoE map to more than one port.
NPIV Proxy Gateway
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