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Description of problem: The whinge message when the arping check fails a Duplicate Address Detect gives the IP involved but not the MAC of the responder. It would aid the admin if this information was output. Version-Release number of selected component (if applicable): RHEL-6/initscripts/9.03.40/2.el6_5.1/initscripts-9.03.40/sysconfig/network-scripts/ifup-eth#244 How reproducible: Always Steps to Reproduce: 1. Set up two systems with a single IP 2. Bring up interface 3. Actual results: "Error, some other host already uses address 10.105.50.58." Expected results: Anything giving the responding MAC as well. Plain output from arping might suffice (it is currently run with a silencing switch; perhaps remove this and divert the output to a variable for use in the fail-case). Possibly some massaging of the output would be needed. Additional info:
Sounds reasonable.
https://git.fedorahosted.org/cgit/initscripts.git/commit/?h=rhel6-branch&id=37e2084f437172353744b10cad600710137d87c6
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-0951.html