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Configuring Switch Mode to Fabric Services
To configure switch mode to Fabric services, use the following commands.
1. Configure Switch mode to Fabric Services.
CONFIGURATION mode
fc switch-mode fabric-services
2. Configure the SAN fabric to which the FC port connects by entering the name of the FCoE map applied to the interface.
INTERFACE mode
fcoe-map <fcoe-map-name> {tengigabitEthernet slot/port | fortygigabitEthernet slot/port}
The FCoE map contains FCoE and FC parameter settings (refer to FCoE Maps). Manually apply the fcoe-map
default_full_fabric to any Ethernet ports used for FCoE.
3. Configure the association between the dedicated VLAN used to carry FCoE traffic between servers and a SAN, and the
fabric where the desired storage arrays are installed.
FCOE MAP mode
fabric-id fabric-num vlan vlan-id
4. Configure the FCoE mapped address prefix (FC-MAP) value which is used to identify FCoE traffic transmitted on the FCoE
VLAN for the specified fabric.
FCOE MAP mode
fc-map fc-map-value
Name Server
Each participant in the FC environment has a unique ID, which is called the World Wide Name (WWN). This WWN is a 64-bit
address.
A Fibre Channel fabric uses another addressing scheme to address the ports in the switched fabric. Each port in the switched
fabric is assigned a 24-bit address by the FC switch. When the device logs into the switch fabric on a specific port with its
WWN, the switch assigns the port address to that port, and the switch also 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.
The domain number allows each switch to have a unique identifier if you have multiple interconnected switches in your
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.
show fc ns
fabric
Display all the devices in name server database of the fabric.
show fc ns
fabric
Displays the fabric name server entries — brief version.
Fabric Services 287