Question: Upon receiving a GTP error indication for the default bearer from an SGW, how does a PGW handle the situation?
Option 1: The PGW updates its Bearer context and notifies the User Equipment (UE).
Option 2: The PGW deletes only the default Bearer context but keeps other associated bearers intact.
Option 3: The PGW ignores the error for the default bearer if there are active non-default bearers.
Option 4: The PGW deletes all Bearer contexts associated with the PDN connection identified by the default bearer and may notify the Operation and Maintenance network element.
Explanation: This is because, according to standard procedures for handling GTP error indications on the default bearer, the PGW must take a comprehensive approach to manage the error's impact. Deleting all Bearer contexts associated with the affected PDN connection ensures consistency and prevents potential conflicts or data inconsistencies. Notifying the Operation and Maintenance network element is also crucial for logging and troubleshooting purposes.