Reference Guide

NPIV Proxy Gateway | 637
DCB Maps
A Data Center Bridging (DCB) map is used to configure DCB functionality, such as PFC and ETS, on
S5000 Ethernet ports that support CEE traffic and are DCBx-enabled by default. For more information, on
PFC and ETS, see Data Center Bridging (DCB).
By default, no PFC and ETS settings in a DCB map are applied to S5000 Ethernet ports when they are
enabled. On an S5000 NPG, you must configure PFC and ETS parameters in a DCB map and then apply
the map to server-facing Ethernet ports (Creating a DCB map).
FCoE Maps
An FCoE map is used to identify the SAN fabric to which FCoE storage traffic is sent. Using an FCoE
map, an S5000 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 on
the S5000:
• 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.
• The priority used by a server to select an upstream FCoE forwarder (FCF priority)
• FIP keepalive (FKA) advertisement timeout
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 (see FIP Snooping on an NPIV Proxy Gateway).
After you apply an FCoE map on an FC port, when you enable the port (no shutdown), the NPG starts
sending FIP multicast advertisements on behalf of the FC port to downstream servers in order 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.
Note: In each FCoE map, the fabric ID, FC-MAP value, and FCoE VLAN must be unique. Use one FCoE
map to access one SAN fabric. You cannot use the same FCoE map to access different fabrics.