answering my own question about the "duplicate IP 0.0.0.0", it was cisco's IP
Device Tracking feature.
putting a "probe delay" of 10 seconds on it fixed the whole problem
Switch01(config)#ip device tracking probe delay 10
http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/8021x/116529-problemsolution-product-00.html
From: Michael R. Haag
Sent: Tuesday, February 16, 2016 9:26 AM
To: '[email protected]'
Subject: "address conflict for IP address 0.0.0.0"
Hello,
When my Packetfence server is up, I occasionally receive errors on various
hosts on my network about an IP address conflict:
"The system detected an address conflict for IP address 0.0.0.0 with the system
having network hardware address CC-D8-C1-B8-9B-A4. Network operations on this
system may be disrupted as a result"
The network connectivity does not seem to be disrupted for any host with the
error.
I only see the error when the Packetfence ZEN appliance is powered on. If I
power off Packetfence the message is not seen on any host.
I am not running dhcpd on the Packetfence server.
What could be causing this problem? Which log on the server should I check for
useful information when troubleshooting this issue?
Thank you,
Michael R. Haag
Computer Services Technician
Department of Information Technology
Madison County, NY
(315) 366-2204
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