If IPoE host creation fails, the system can generate an accounting stop message. This feature is similar to the feature described in Sending an accounting stop message upon a RADIUS authentication failure of a PPPoE session. It allows the system to generate an accounting stop message for most host creation failure cases. For IPoE, only the failure event ‟on-accept-failure” is supported. This failure condition applies when the host was successfully authenticated but the host creation failed (for example, a duplicate host IP address was detected on the new host).
Because RADIUS accounting starts only after the host is successfully created, a failed host cannot trigger a RADIUS accounting message. For this reason, similar to PPPoE, the local user database must be used to provide the RADIUS accounting server for reporting the failure.
The [26.6527.226] Alc-Error-Code and [26.6527.227] Alc-Error-Message attributes are used to report the failure in the RADIUS accounting stop message. The error code is a numeric value that represents the error, and the error message is a descriptive text string that describes the actual failure reason. For IPoE, the error code uses the 279 value (in decimal format) or 0x117 value (in hexadecimal format) "Failed to create subscriber host". The error message provides the same detailed reason for the host creation failure as the log message in log 99.