Why ethtool -G gives error "Cannot set device ring parameters: Invalid argument".

Solution Verified - Updated -

Issue

  • ethtool -G gives error "Cannot set device ring parameters: Invalid argument" why ?
  • ethtool gives below error
 $ethtool -G ethX rx 4096 
 Cannot set device ring parameters: Invalid argument

Environment

  • Red Hat Enterprise Linux
    • 5.x
    • 6.x

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