Six new RTT procedures (Procedures 21 to 26) have been introduced with this feature and are specific to ePDG. Procedures that are existing for P-GW are enhanced to support ePDG are also listed in the following table.

Note	Procedures that are enhanced to support ePDG and new procedures that are introduced are only listed in the above table.

The following figure details the new RTT schema.

RTT schema has a Header and the following six blocks of Information Elements (IEs). There are totally 170 IEs that are grouped in 6 blocks. Contact your Cisco account representative for the complete list of RTT Record Schema IEs.

• Common IEs

• GPRS Tunneling Protocol (GTP) IEs. These IEs are existing and are re-used.

• Diameter IEs (new IEs)

• Proxy Mobile IPv6 IEs

• Internet Key Exchange (IKE)/ Internet Protocol Security (IPsec) IEs

• Internet Protocol v6 Router Advertisement (IPv6 RA IEs

Note	IKE/IPSec and IPv6 RA IEs are new and they are contained inside new blocks. Diameter IEs are new and are appended to the existing Diameter IE blocks.

Use the following configuration for enabling RTT to record and produce call transactions.

configure 
            context context_name 
              epdg-service service_name 
                [ no ] reporting-action event-record 
            end 

NOTES:

• reporting-action event-record : Enables event reporting through RTT in ePDG.

• no : Disables event reporting through RTT in ePDG.

Use the following CLI commands to configure the RTT feature in ePDG.

configure 
            context context_name 
              session-event-module 
                event transfer-mode push primary url URL_address 
                file name file_name|rotation volume volume_size|rotation time rotation_time|compression compression_type|extension extension_type 
                event use-harddisk 
                event remove-file-after-transfer 
                event push-interval interval_time      
             end 

NOTES:

• transfer-mode : Enables the transfer mode in RTT.

• push primary url : Specifies the external server location where the records are transferred from ePDG.

• file name : Specifies the RTT file name where the records are stored.

• rotation volume: The volume based on which the RTT file is generated.

• rotation time: The time based on which the RTT file is generated.

  Note	The RTT files are pushed to the external server based on the rotation volume or rotation time, whichever occurs first.

• compression: Specifies the file compression type. If enabled, the RTT file is generated as a Gzip file, else it is generated as a normal file.

• extension: Specifies the RTT file extension (.csv).

• use-harddisk: Specifies hard disk as the storage space for the RTT file generation.

• remove-file-after-transfer: Specifies RTT files to be removed after pushing the files to the external server.

• push-interval: Specifies the push interval time at which the RTT file are transferred from ePDG to the external server.

This section provides information regarding show commands and their outputs for this feature.