Bonding slaves show link speed as 100Mbps for gigabit slave interfaces (netxen_nic driver) in /proc/net/bonding on RHEL 5

Solution Unverified - Updated -


  • While 'ethtool' correctly reports 1000mbps speed for my NIC, why is /proc/net/bonding/bond0 reporting 'Speed: 100 Mbps' sometimes?
  • Subsequent executions of 'service network restart' provoke different values for interface speed to be reported in /proc/net/bonding/bond0, sometimes the reported speed is correct.


  • Red Hat Enterprise Linux 5.8 and below
  • kernel 2.6.18-274.7.1.el5
  • HP NC375T Quadport Gigabit Network Interface Card (NIC)
  • netxen_nic kernel driver module used

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