Reference Guide

Term Description
NPIV N-port identifier virtualization: The capability to
map multiple FCoE links from downstream ports to
a single upstream FC link.
principal switch The switch in a fabric with the lowest domain
number. The principal switch accesses the master
name database and the zone/zone set database.
DCB Maps
To configure DCB functionality, such as PFC and ETS, on Ethernet ports that support CEE traffic, use a
data center bridging (DCB) map.
DCB maps are DCBx-enabled by default. For more about PFC and ETS, refer to Data Center Bridging
(DCB).
By default, no PFC and ETS settings in a DCB map are applied to Ethernet ports when you enable them.
On an NPG, configure PFC and ETS parameters in a DCB map and then apply the map to server-facing
Ethernet ports (for more information, refer to Creating a DCB Map).
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.
NPIV Proxy Gateway
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