Cisco Bug: CSCvu23831 - EM login / logouts are failing with error code 28 when device is using IPv6
Sep 01, 2020
- Cisco Unified Communications Manager (CallManager)
Known Affected Releases
Symptom: Extension Mobility login and logouts fail with error code "28" in when IP phone is in IPv6 only mode. EM Service logs may show an error like this: 2020-04-24 13:17:20,958 INFO [http-bio-8443-exec-19] EMServiceServlet - 2:Request succeeded returning<response> <failure> <error code="28">Received request from Untrusted IP = x:x:x:x:x:x:x:x</error> </failure> </response> Conditions: - Phone is registered with IPv6 mode and IPv6 address notation differs for same end point - Service parameter "Validate IP address" is set to "true".
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