bnx2fc.txt outlines the driver usage model. Signed-off-by: Bhanu Prakash Gollapudi <bprakash@xxxxxxxxxxxx> --- Documentation/scsi/bnx2fc.txt | 76 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 76 insertions(+), 0 deletions(-) create mode 100644 Documentation/scsi/bnx2fc.txt diff --git a/Documentation/scsi/bnx2fc.txt b/Documentation/scsi/bnx2fc.txt new file mode 100644 index 0000000..59e218c --- /dev/null +++ b/Documentation/scsi/bnx2fc.txt @@ -0,0 +1,76 @@ +Operating FCoE using bnx2fc +=========================== +Broadcom FCoE offload through bnx2fc is full stateful hardware offload that +cooperates with all interfaces provided by the Linux ecosystem for FC/FCoE and +SCSI controllers. As such, FCoE functionality, once enabled is largely +transparent. Devices discovered on the SAN will be registered and unregistered +automatically with the upper storage layers. + +Despite the fact that the Broadcom's FCoE offload is fully offloaded, it does +depend on the state of the network interfaces to operate. As such, the network +interface (e.g. eth0) associated with the FCoE offload initiator must be 'up'. +It is recommended that the network interfaces be configured to be brought up +automatically at boot time. + +Furthermore, the Broadcom FCoE offload solution creates VLAN interfaces to +support the VLANs that have been discovered for FCoE operation (e.g. +eth0.1001-fcoe). Do not delete or disable these interfaces or FCoE operation +will be disrupted. + +Driver Usage Model: +=================== + +1. Ensure that fcoe-utils package is installed. + +2. Configure the interfaces on which bnx2fc driver has to operate on. +Here are the steps to configure: + a. cd /etc/fcoe + b. copy cfg-ethx to cfg-eth5 if FCoE has to be enabled on eth5. + c. Repeat this for all the interfaces where FCoE has to be enabled. + d. Edit all the cfg-eth files to set "no" for DCB_REQUIRED** field, and + "yes" for AUTO_VLAN. + e. Other configuration parameters should be left as default + +3. Ensure that "bnx2fc" is in SUPPORTED_DRIVERS list in /etc/fcoe/config. + +4. Start fcoe service. (service fcoe start). If Broadcom devices are present in +the system, bnx2fc driver would automatically claim the interfaces, starts vlan +discovery and log into the targets. + +5. "Symbolic Name" in 'fcoeadm -i' output would display if bnx2fc has claimed +the interface. +Eg: +[root@bh2 ~]# fcoeadm -i + Description: NetXtreme II BCM57712 10 Gigabit Ethernet + Revision: 01 + Manufacturer: Broadcom Corporation + Serial Number: 0010186FD558 + Driver: bnx2x 1.70.00-0 + Number of Ports: 2 + + Symbolic Name: bnx2fc v1.0.5 over eth5.4 + OS Device Name: host11 + Node Name: 0x10000010186FD559 + Port Name: 0x20000010186FD559 + FabricName: 0x2001000DECB3B681 + Speed: 10 Gbit + Supported Speed: 10 Gbit + MaxFrameSize: 2048 + FC-ID (Port ID): 0x0F0377 + State: Online + +6. Verify the vlan discovery is performed by running ifconfig and notice +<INTERFACE>.<VLAN>-fcoe interfaces are automatically created. + +Refer to fcoeadm manpage for more information on fcoeadm operations to +create/destroy interfaces or to display lun/target information. + +NOTE: +==== +** Broadcom FCoE capable devices implement a DCBX/LLDP client on-chip. Only one +LLDP client is allowed per interface. For proper operation all host software +based DCBX/LLDP clients (e.g. lldpad) must be disabled. To disable lldpad on a +given interface, run the following command: + +lldptool set-lldp -i <interface_name> adminStatus=disabled + -- 1.7.0.6 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
