CISCO-GTPV2-MIB
This MIB module manages the GPRS Tunneling Protocol version 2(GTPv2) statistics for the Evolved Packet Core(EPC) architecture. SGW and PGW are the key elements of EPC architecture. The PGW is the permanent IP point-of-attachment for access via the E-UTRAN. The PGW performs IP policy and charging enforcement on packet flows to and from mobile devices. The SGW is a local mobility anchor for E-UTRAN mobility, switching packets between the S5 interface and the GTP based S1-U interface for mobiles in connected mode. The following diagram illustrates the EPC logical architecture with the name of inter-node interface: +------------------------------------------------+ | | | | | +=======+__________ | | | UTRAN | |S12 | | | +======+ | | | +======| | | | | +======| SGSN |___ | | | | +======+ || | | | GERAN | | S4|| | | +=======+ |(GTP-C|| | | S3| VO,V1|| | | | GTPU|| | | |VO,V1)|| | | +======+ || | | ____| MME |__ || | | | +======+ ||| | | S1-MME| S11 ||| | | | GTP-C ||| | | | (V0,V1,V2) ||| | |+====+ +========+ +======+ +======+ | +===+ || UE |-|E-Utran | | SGW | | PGW |-SGi-|PDN| || | |(EnodeB)| | | | | | | | |+====+ +========+ +======+ +======+ | +===+ | | | | GTP-C | | | | | |(vo,v1,v2)| | | | | |GTP-C | | | | | | (vo,v1) | | | | GTP v2-u | | | | | ------------ ----------- | | (S1-U) S5 | | | +------------------------------------------------+ GTP is the protocol between SGW and PGW in the EPC backbone network. It includes both the GTP signaling and data transfer procedures. The GTP signaling provides control and support for the user data and is know as control plane messages. Where as the user data is known as user plane messages. SGW and PGW supports GTPv2, GTPv1 and GTPv0 simultaneously. GTPv2 has been introduced in this evolution. It is different from GTPv1 and GTPv0 in few respects, for E-UTRAN access to EPC, the PDN connectivity service is provided by EPS bearer. An EPS bearer uniquely identifies traffic flows between an UE and EPC. Acronyms and terms: 3GPP 3rd Generation Partnership Project EPC Evolved Packet Core EPS Evolved Packet System E-UTRAN Evolved UTRAN GPRS General Packet Radio Service GTP GPRS Tunneling Protocol PDN Public Data Network PGW PDN Gateway SGW Serving Gateway UE User Equipment UMTS Universal Mobile Telecommunications System UTRAN UMTS Radio Access Network REFERENCE [1] 3GPP: Evolved GPRS Tunneling Protocol for Control Plane (GTPv2-C). 3GPP TS 29.274 V1.3.1 [2] 3GPP: GPRS enhancements for EUTRAN access. 3GPP TS 23.401 V8.3.0