Cisco Cisco Packet Data Interworking Function (PDIF)

 

This is an existing command, now supported by S4-SGSN. The command option 

 has to be configured in order to inform SGW that S4-SGSN supports receiving PRN. 

configure 

  context context_name 

    egtp_service service_name 

      gtpc { allow-on-congestion { apn-name apn_name | arp priority_level } | bind { 
ipv4-address ipv4_address [ ipv6-address ipv6_address ] | ipv6-address ipv6_address [ 
ipv4-address ipv4_address ] } | echo-interval seconds [ dynamic [ smooth-factor 
multiplier ] ] | echo-retransmission-timeout seconds | error-response-handling | ip qos-
dscp { forwarding_type } | max-retransmissions num | node-feature pgw-restart-
notification | path-failure detection-policy echo | private-extension overcharge-
protection | retransmission-timeout seconds } 

      no gtpc { allow-on-congestion { apn-name apn_name | arp priority_level } | bind { 
ipv4-address ipv4_address [ ipv6-address ipv6_address ] | ipv6-address ipv6_address [ 
ipv4-address ipv4_address ] } | echo-interval | error-response-handling | node-feature 
pgw-restart-notification | path-failure detection-policy | private-extension overcharge-
protection  } 

      default gtpc { echo-interval | echo-retransmission-timeout  | ip qos-dscp | max-
retransmissions | node-feature pgw-restart-notification | path-failure detection-policy | 
retransmission-timeout } 

      end 

This new command is used to configure the APN restoration priority value. 

configure 

  apn-profile profile_name 

        apn-restoration priority priority_value 

        remove apn-restoration priority  

        end 

Notes: 



 

The PGW Restart Notification (PRN) message is sent by the S-GW when it detects a peer P-GW has re-started. 

The S4-SGSN on receiving the PRN message, uses the default apn-restoration priority value, if priority value is 
not available in HSS Subscription to prioritize the affected PDN connections for restoration. To restore PDN it 
is mandatory to get priority value from HSS in subscription record or default value must be configured under 
apn-profile.