Duplicate IP 0.0.0.0 Conflict on 802.1X Windows 7 Clients
Ever since we implemented ISE 1.x with 802.1X authentication about two years ago, a number of our Windows 7 user stations occassionally report the well known error message: "duplicate ip 0.0.0.0" . Only wired stations are affected and it happens randomly but not frequently. On further investigation I found that the conflicting device mac address in every case is in fact the bia of the switch port that the Windows 7 PC client is connected. The characteristics of each case is consistent with the Cisco device tracking process as detailed in TAC Document ID: 116529, Updated: Oct 09, 2013 http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/8021x/116529-problemsolution-product-00.html
We have Cisco C6500 access switches with IOS Ver: 12.2(33)SXJ1.The output of "Show ip device track all" command on the switches: access-switch#sh ip device track all IP Device Tracking = Enabled IP Device Tracking Probe Count = 3 IP Device Tracking Probe Interval = 30
I found that Cisco recommends three Solution options as follows: 1. ip device tracking probe delay 10 2. ip device tracking probe use-svi 3. ip device tracking probe interval <seconds>
However, the ios only shows track probe "count" and "interval" for change. There is no option to change the probe delay or use-svi in this IOS.
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