Why does mii-tool or ethtool show "10Mbit half duplex" on bonded interface ?

Solution Verified - Updated -

Issue

  • Bond is setup using eth0 and eth1. mii-tool bond0 reports as 10mb half duplex . However both interfaces individually are reporting 1000Mbps via dmesg, ethtool and mii-tool. Why does bond0 reports a different speed/duplex ?

  • mii-tool reports 10 Mbit,half duplex speed on bonded interface. Is this expected ?

# mii-tool bond0
bond0: 10 Mbit, half duplex, link ok

Environment

  • Red Hat Enterprise Linux 4
  • Red Hat Enterprise Linux 5

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