1 .. SPDX-License-Identifier: GPL-2.0 2 3 =========================== 4 Operating FCoE using bnx2fc 5 =========================== 6 Broadcom FCoE offload through bnx2fc is full stateful hardware offload that 7 cooperates with all interfaces provided by the Linux ecosystem for FC/FCoE and 8 SCSI controllers. As such, FCoE functionality, once enabled is largely 9 transparent. Devices discovered on the SAN will be registered and unregistered 10 automatically with the upper storage layers. 11 12 Despite the fact that the Broadcom's FCoE offload is fully offloaded, it does 13 depend on the state of the network interfaces to operate. As such, the network 14 interface (e.g. eth0) associated with the FCoE offload initiator must be 'up'. 15 It is recommended that the network interfaces be configured to be brought up 16 automatically at boot time. 17 18 Furthermore, the Broadcom FCoE offload solution creates VLAN interfaces to 19 support the VLANs that have been discovered for FCoE operation (e.g. 20 eth0.1001-fcoe). Do not delete or disable these interfaces or FCoE operation 21 will be disrupted. 22 23 Driver Usage Model: 24 =================== 25 26 1. Ensure that fcoe-utils package is installed. 27 28 2. Configure the interfaces on which bnx2fc driver has to operate on. 29 Here are the steps to configure: 30 31 a. cd /etc/fcoe 32 b. copy cfg-ethx to cfg-eth5 if FCoE has to be enabled on eth5. 33 c. Repeat this for all the interfaces where FCoE has to be enabled. 34 d. Edit all the cfg-eth files to set "no" for DCB_REQUIRED** field, and 35 "yes" for AUTO_VLAN. 36 e. Other configuration parameters should be left as default 37 38 3. Ensure that "bnx2fc" is in SUPPORTED_DRIVERS list in /etc/fcoe/config. 39 40 4. Start fcoe service. (service fcoe start). If Broadcom devices are present in 41 the system, bnx2fc driver would automatically claim the interfaces, starts vlan 42 discovery and log into the targets. 43 44 5. "Symbolic Name" in 'fcoeadm -i' output would display if bnx2fc has claimed 45 the interface. 46 47 Eg:: 48 49 [root@bh2 ~]# fcoeadm -i 50 Description: NetXtreme II BCM57712 10 Gigabit Ethernet 51 Revision: 01 52 Manufacturer: Broadcom Corporation 53 Serial Number: 0010186FD558 54 Driver: bnx2x 1.70.00-0 55 Number of Ports: 2 56 57 Symbolic Name: bnx2fc v1.0.5 over eth5.4 58 OS Device Name: host11 59 Node Name: 0x10000010186FD559 60 Port Name: 0x20000010186FD559 61 FabricName: 0x2001000DECB3B681 62 Speed: 10 Gbit 63 Supported Speed: 10 Gbit 64 MaxFrameSize: 2048 65 FC-ID (Port ID): 0x0F0377 66 State: Online 67 68 6. Verify the vlan discovery is performed by running ifconfig and notice 69 <INTERFACE>.<VLAN>-fcoe interfaces are automatically created. 70 71 Refer to fcoeadm manpage for more information on fcoeadm operations to 72 create/destroy interfaces or to display lun/target information. 73 74 NOTE 75 ==== 76 ** Broadcom FCoE capable devices implement a DCBX/LLDP client on-chip. Only one 77 LLDP client is allowed per interface. For proper operation all host software 78 based DCBX/LLDP clients (e.g. lldpad) must be disabled. To disable lldpad on a 79 given interface, run the following command:: 80 81 lldptool set-lldp -i <interface_name> adminStatus=disabled
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