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Bhanu Prakash Gollapudi12b8fc12011-09-13 11:55:14 -07001Operating FCoE using bnx2fc
2===========================
3Broadcom FCoE offload through bnx2fc is full stateful hardware offload that
4cooperates with all interfaces provided by the Linux ecosystem for FC/FCoE and
5SCSI controllers. As such, FCoE functionality, once enabled is largely
6transparent. Devices discovered on the SAN will be registered and unregistered
7automatically with the upper storage layers.
8
9Despite the fact that the Broadcom's FCoE offload is fully offloaded, it does
10depend on the state of the network interfaces to operate. As such, the network
11interface (e.g. eth0) associated with the FCoE offload initiator must be 'up'.
12It is recommended that the network interfaces be configured to be brought up
13automatically at boot time.
14
15Furthermore, the Broadcom FCoE offload solution creates VLAN interfaces to
16support the VLANs that have been discovered for FCoE operation (e.g.
17eth0.1001-fcoe). Do not delete or disable these interfaces or FCoE operation
18will be disrupted.
19
20Driver Usage Model:
21===================
22
231. Ensure that fcoe-utils package is installed.
24
252. Configure the interfaces on which bnx2fc driver has to operate on.
26Here are the steps to configure:
27 a. cd /etc/fcoe
28 b. copy cfg-ethx to cfg-eth5 if FCoE has to be enabled on eth5.
29 c. Repeat this for all the interfaces where FCoE has to be enabled.
30 d. Edit all the cfg-eth files to set "no" for DCB_REQUIRED** field, and
31 "yes" for AUTO_VLAN.
32 e. Other configuration parameters should be left as default
33
343. Ensure that "bnx2fc" is in SUPPORTED_DRIVERS list in /etc/fcoe/config.
35
364. Start fcoe service. (service fcoe start). If Broadcom devices are present in
37the system, bnx2fc driver would automatically claim the interfaces, starts vlan
38discovery and log into the targets.
39
405. "Symbolic Name" in 'fcoeadm -i' output would display if bnx2fc has claimed
41the interface.
42Eg:
43[root@bh2 ~]# fcoeadm -i
44 Description: NetXtreme II BCM57712 10 Gigabit Ethernet
45 Revision: 01
46 Manufacturer: Broadcom Corporation
47 Serial Number: 0010186FD558
48 Driver: bnx2x 1.70.00-0
49 Number of Ports: 2
50
51 Symbolic Name: bnx2fc v1.0.5 over eth5.4
52 OS Device Name: host11
53 Node Name: 0x10000010186FD559
54 Port Name: 0x20000010186FD559
55 FabricName: 0x2001000DECB3B681
56 Speed: 10 Gbit
57 Supported Speed: 10 Gbit
58 MaxFrameSize: 2048
59 FC-ID (Port ID): 0x0F0377
60 State: Online
61
626. Verify the vlan discovery is performed by running ifconfig and notice
63<INTERFACE>.<VLAN>-fcoe interfaces are automatically created.
64
65Refer to fcoeadm manpage for more information on fcoeadm operations to
66create/destroy interfaces or to display lun/target information.
67
68NOTE:
69====
70** Broadcom FCoE capable devices implement a DCBX/LLDP client on-chip. Only one
71LLDP client is allowed per interface. For proper operation all host software
72based DCBX/LLDP clients (e.g. lldpad) must be disabled. To disable lldpad on a
73given interface, run the following command:
74
75lldptool set-lldp -i <interface_name> adminStatus=disabled