Configuring FCoE Devices With COMSTAR

You can set up and configure a COMSTAR target in a Fibre Channel over Ethernet (FCoE) network environment, then make it accessible to the storage network. Ensure that your system meets the necessary prerequisites before you begin:

Configuring FCoE Ports

Enabling 802.3x PAUSE and Jumbo Frames on the Ethernet Interface
How to Create FCoE Target Ports
How to Verify That an FCoE Target Port Is Working
How to Delete FCoE Target Ports

FCoE functionality is provided through Ethernet interfaces. Fibre Channel over Ethernet (FCoE) ports are logical entities associated with Ethernet interfaces. Within an Oracle Solaris system, a one-to-one mapping of FCoE ports and Ethernet interfaces exist. You can associate only one FCoE port with a given Ethernet interface. FCoE and IP cannot share the same Ethernet interface. So, before you create an FCoE port on an Ethernet interface, ensure that the interface has been unplumbed.

The FCoE port configuration is persistent across reboots. All configured FCoE ports are created and placed online automatically after the system reboots.

For FCoE target ports, you must enable the following service before creating FCoE target ports to get persistent behavior.

# svcadm enable svc:/system/fcoe_target:default

Enabling 802.3x PAUSE and Jumbo Frames on the Ethernet Interface

These settings can vary for different Ethernet hardware and drivers. In most cases, you must modify the driver.conf file of the Ethernet interface and then reboot. See the driver.conf file for your Ethernet interface for details on how to enable these features.

Perform one of the following prerequisite steps before you create an FCoE port on an Ethernet interface:

Enable 802.3x (also called PAUSE) on the Ethernet interface.

Doing so ensures a consistent Ethernet transport.
Enable jumbo frames (> 2.5 Kbyte) on the Ethernet interface.

A Fibre Channel data frame can be as large as 2136 bytes.

How to Create FCoE Target Ports

Create an FCoE target port on a specified network interface.
```
# fcadm create-fcoe-port -t nxge0
```
If the Ethernet interface you selected does not support multiple unicast address (for example, the VMware network interface), you are prompted to explicitly enable promiscuous mode on that interface.
Enable promiscuous mode, if prompted.
```
# fcadm create-fcoe-port -t -f e1000g0
```
If no error messages appear, the FCoE target port is created, and the FCoE target is online.

How to Verify That an FCoE Target Port Is Working

Display the FCoE ports that you created.

# fcadm list-fcoe-ports
HBA Port WWN: 200000144fda7f66
    Port Type: Target
    MAC Name: nxge0
    MTU Size: 9194
    MAC Factory Address: 00144fda7f66
    MAC Current Address: 0efc009a002a
    Promiscuous Mode: On

Display all target mode Fibre Channel HBA ports on the host.

# fcinfo hba-port -t
HBA Port WWN: 200000144fda7f66
    Port Mode: Target
    Port ID: 9a002a
    OS Device Name: Not Applicable
    Manufacturer: Sun Microsystems, Inc.
    Model: FCoE Virtual FC HBA
    Firmware Version: N/A
    FCode/BIOS Version: N/A
    Serial Number: N/A
    Driver Name: COMSTAR FCOET
    Driver Version: 1.0
    Type: F-port
    State: online
    Supported Speeds: 1Gb 10 Gb
    Current Speed: 10Gb
    Node WWN: 100000144fda7f66

View a list of the FCoE target ports.

The -v option displays additional information about the target, along with SCSI session information for logged-in initiators.

# stmfadm list-target -v
Target wwn.200000144FDA7F66
     Operational Status: Online
     Provider Name     : fcoet
     Alias             : fcoet1
     Sessions          : 1
          Initiator: wwn.210000E08B818343
              Alias: #QLA2342 FW:v3.03.25 DVR:v8.02.14.01
              Logged in since: ...

How to Delete FCoE Target Ports

You can disable FCoE functionality when needed.

Take the FCoE target port offline.

# stmfadm offline-target wwn.200000144fda7f66

Remove the FCoE target port.
```
# fcadm delete-fcoe-port nxge0
```

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