Why the duplicated address verification is not done for aliases interfaces?

Solution Verified - Updated -

Issue

The ifup-alias script, from initscripts, doesn't verify if the IP address from network interface alias is already in use.
Therefore, it's possible there is duplicate IP addresses on alias interfaces.

Environment

  • Red Hat Enterprise Linux 5 and 6
  • initscripts before initscripts-9.03.32-1.el6

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