FCoE interface stays in 'Offline' state

Issue

• We have configured FCoE as per the steps in storage administration guide, but the fcoeadm -i output shows interfaces as Offline:

  $ fcoeadm -i
      Description:      BCM57840 NetXtreme II 10 Gigabit Ethernet
      Revision:         11
      Manufacturer:     Broadcom Limited
      Serial Number:    F4E111111111
  
      Driver:           bnx2x 1.714.20
      Number of Ports:  1
  
      Symbolic Name:     bnx2fc (QLogic BCM57840) v2.12.3 over eth3.1003
      OS Device Name:    host16
      Node Name:         0x2000544812293249a
      Port Name:         0x2001544812293249a
      Fabric Name:        0x0
      Speed:             10 Gbit
      Supported Speed:   1 Gbit, 10 Gbit
      MaxFrameSize:      2048 bytes
      FC-ID (Port ID):   0xffffffff
      State:             Offline          <----------
  
  
      Description:      BCM57840 NetXtreme II 10 Gigabit Ethernet
      Revision:         11
      Manufacturer:     Broadcom Limited
      Serial Number:    F4E222222222
  
      Driver:           bnx2x 1.714.20
      Number of Ports:  1
  
      Symbolic Name:     bnx2fc (QLogic BCM57840) v2.12.3 over eth2.1002
      OS Device Name:    host15
      Node Name:         0x2000544812293497
      Port Name:         0x2001544812293497
      Fabric Name:        0x0
      Speed:             10 Gbit
      Supported Speed:   1 Gbit, 10 Gbit
      MaxFrameSize:      2048 bytes
      FC-ID (Port ID):   0xffffffff
      State:             Offline          <----------