Why does 'ifconfig' command outputs the message "Ifconfig uses obsolete kernel interface" ?

Solution Verified - Updated -

Issue

  • Why does 'ifconfig' command outputs the error message "Ifconfig uses obsolete kernel interface"
  • When Infiniband is configured, ifconfig command outputs following messages :
  Ifconfig uses the ioctl access method to get the full address information, which limits hardware addresses to 8 bytes.
  Because Infiniband address has 20 bytes, only the first 8 bytes are displayed correctly.
  Ifconfig is obsolete! For replacement check ip.

Environment

Red Hat Enterprise Linux (RHEL)

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