Understanding R6, R7, R8, and R9 Information Elements Removal
The Third-Generation Partnership Project (3GPP) R6, R7, R8, and R9 information elements (IEs) removal feature allows you to retain interoperability in roaming between Second-Generation Partnership Project (2GPP) and 3GPP networks. You can configure the GPRS tunneling protocol (GTP)-aware Juniper Networks device, residing on the border of a public land mobile network (PLMN) and a GPRS Roaming Exchange (GRX) and acting as a Gp firewall, to remove 3GPP-specific attributes from the GTP packet header when the packet passes into a 2GPP network. You can configure the device to remove the RAT, RAI, Common Flags, ULI, MS Time Zone, IMEI-SV, and access point name (APN) restriction IEs from GTP messages prior to forwarding these messages to the gateway GPRS support node (GGSN).
