Link not detected on Broadcom Corporation NetXtreme II BCM5706 Gigabit Ethernet

Issue

• A system with Broadcom Gigabit Ethernet (rev 02) loads the bnx2 driver but it doesn't detect link:

Settings for eth0:  
  Supported ports: [ TP ]  
  Supported link modes: 10baseT/Half 10baseT/Full  
  100baseT/Half 100baseT/Full  
  1000baseT/Full  
  Supports auto-negotiation: Yes  
  Advertised link modes: 10baseT/Half 10baseT/Full  
  100baseT/Half 100baseT/Full  
  1000baseT/Full  
  Advertised pause frame use: No  
  Advertised auto-negotiation: Yes  
  Speed: Unknown!  
  Duplex: Unknown! (255)  
  Port: Twisted Pair  
  PHYAD: 1  
  Transceiver: internal  
  Auto-negotiation: on  
  MDI-X: Unknown  
  Supports Wake-on: g  
  Wake-on: g  
  Link detected: no

• The network switch shows link for these interfaces.