GTP handover messages

GTP handover messages are supported on devices for Services Gateways. During a handover procedure, SGSN context messages request/response/acknowledge) or forward relocation messages, referred as handover messages, are sent between the new and the old MME/SGSN. PDP context information, acquired from handover messages, is set up on SRX Series devices when these messages are received. Subsequently, the GTP messages can be normally inspected according to the new PDP context.

 The following key features are supported: 

•  Inter-MME/SGSN handover messages inspection 
•  GTP PDP context/forwarding tunnel setup according to the information in handover messages 
•  GTP-U inspection for forwarding data traffic 
•  Support for PDP context update by updating or modifying messages with different versions 
•  System log and counter for handover messages