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Decreased Location Tracking since upgrade to WLC 7.0.98.0 or 7.0.116.0

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On WLC code 7.0.98.0 or 7.0.116.0, you will notice a degraded tracking for RFID tags. In most of the cases there will be missing "hearing access points" for the RFID tags causing non-accurate location.

This problem is caused by bug CSCtr20250.

Symptom:

Location tracking is not working as expected due to WLC code 7.0.116.0 not taking into consideration all hearing access points for a particular tag. The error message that appears on WLC "debug rfid error enable" is:

<tag mac address> rfid Aerosct updated by AP <mac address> has invalid rssi -128

Workaround:

Dowgrade wlc code to 6.0.202.0

Fix:

This bug is going to be fixed in upcoming 7.0 release and onwards. You can also open a TAC Service request and request a special code based on 7.0 in the meantime.

You are also invited to read through this document for more information on Location tracking troubleshooting:

https://supportforums.cisco.com/docs/DOC-13604

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