Administrator Guide
Term Description
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
A Data Center Bridging (DCB) map is used to configure DCB functionality, such as PFC and ETS, on FN IOM
with the FC Flex IO module 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 FN IOM with the FC Flex IO module Ethernet
ports when they are enabled. On the FN IOM with the FC Flex IO module NPG, you must configure PFC and
ETS parameters in a DCB map and then apply the map to server-facing Ethernet ports (see the “Creating a
DCB map" section).
FCoE Maps
An FCoE map is used to identify the SAN fabric to which FCoE storage traffic is sent. Using an FCoE map, the
FN IOM with the FC Flex IO module 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
FN IOM with the FC Flex IO module:
• 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
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.
When you configure the FN IOM with the FC Flex IO module 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.
FC Flex IO Modules 1093