Administrator Guide

maintains the correlation between the port address and the WWN address of the device on that port. This
function of the switch is implemented by using a name server, a database of objects in which the fabric
attached device registers its values.
FC-ID: 24-bit port address. Consists of three parts:
• Domain: Address of the switch itself. There are only 239 addresses available for switches in your SAN
environment.
• Area: Identifies a group of F_Ports. Each group of ports has a different area number, even if there is only
one port in the group.
• Port: Provides 256 addresses for identifying attached N_Ports and NL_Ports.
The following sequence explains the operation for the attached N_Port:
• N_Port sends a Fabric Login (FLOGI) as it requests a unique 24-bit address from the Fabric Login Server.
• N_Port sends FLOGI to address 0xFFFFFE. Upon success, it obtains a valid address (FCID).
• N_Port sends a Port Login (PLOGI) to inform the Fabric Name Server of its personality and capabilities,
this includes WWNN, WWPN.
• N_Port sends PLOGI to address 0xFFFFFC to register this address with the name server.
Command Description
show fc ns
switch
Display all the devices in name server database of the switch.
show fc ns
switch brief
Displays the local name server entries — brief version.
The following configurations are applicable only after configuring the switch mode to FCF Port mode using
the feature fc fport domain id 2 command. When you set Switch mode to FCF Port mode, any
previously configured fcoe-map is removed.
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.
FC FPORT 329