CISCO-GTP-MIB

This MIB module manages the GPRS Tunnelling Protocol (GTP) on GGSN and SGSN. GPRS provides wireless access to packet data network on the GSM infrastructure. The following diagram illustrates a simplified GPRS logical architecture with the name of inter-node interface: +---------------------------------------------+ | +======+ a PLMN | | | SGSN | | | +======+ | | | | | Gn | | | | |+====+ +====+ +=====+ +======+ +======+ | +===+ || TE |-R-| MT |-| BSS |-| SGSN |-Gn-| GGSN |-|-Gi-|PDN| |+====+ +====+ +=====+ +======+ +======+ | +===+ | | | | | | +----------------------------------------|----+ Gp | +-----------------------------+ | +====+ +=====+ +======+ | | | MS |---| BSS |---| SGSN | | | +====+ +=====+ +======+ | | | | other PLMN | +-----------------------------+ GTP is the protocol between GSN nodes (GSN peers) in the GPRS backbone network. It includes both the GTP signalling and data transfer procedures. GTP is used both on the Gn interface, i.e. the interface between GSN peers with in a PLMN, and the Gp interface between GSN peers in different PLMNs. SGSN is the serving GPRS support node, it responsible for the delivery of data packets from and to the MS within its service area. GGSN is the gateway GPRS support node, it provides interworking with external PDN and is connected with SGSNs via an IP-based GPRS backbone network. The GTP protocol is implemented only by SGSNs and GGSN. A PDP Context is an information set maintained by MS and GSNs which describes the mobile wireless service call or session. A Qos Profile is associated with each PDP context which defines multiple attributes like precedence, delay, reliability, peak throughput and mean throughput. Based on the precedence, delay and mean throughput an user is classified into one of the three Qos classes: Best Effort, Normal and Premium. Mean throughput is measured at the Gi and R reference points in units of octets per second. It specifies the average rate at which data is expected to be transferred across the GPRS network during the remaining lifetime of an activated PDP context. A MAP converting GSN is responsible for converting GTP messages to and from MAP messages. This helps in the communication with HLR. Acronyms and terms: APN Access Point Name BSS Base Station Subsystem ETSI European Telecommunications Standards Institute GDM GTP Director Module Gi Reference point between GPRS and an external packet data network. Gn the interface between GSNs within a PLMN Gp the interface between GSNs in different PLMNs GGSN Gateway GPRS Support Node GPRS General Packet Radio Service GSM Global System for Mobile communication GSN GPRS Support Node G-PDU GTP PDU HLR Home Location Register MAP Mobile Application Protocol MS Mobile Station = TE + MT MT Mobile Termination NMS Network Management System PDN Public Data Network PDP Packet Data Protocol PDU Protocol Data Unit PLMN Public Land Mobile Network R Reference point between a non-ISDN compatible TE and MT. SGSN Serving GPRS Support Node TE Terminal Equipment T-PDU the payload of G-PDU

MIB content (185 objects)

Informations

Organization
Cisco Systems, Inc.
Contact info
Cisco Systems Customer Service Postal: 170 W Tasman Drive San Jose, CA 95134 USA Tel: +1 800 553-NETS E-mail: cs-gprs@cisco.com

Revisions

2006-08-07 00:00
Added cGtpPathHistoryLimit to cGtpConfigurations. Added the cGtpPathStatisticsTable, cGtpPathStatisticsHistoryTable to cGtpStatistics.
2002-11-09 16:00
Modified the description of cGtpDynamicEchoTimerMinTime and cGtpDynamicEchoTimerSmoothFactor. Added the cGtpPathTable. The following have been deprecated cGtpGSNTable, cGtpMIBComplianceRev3, cGtpStatusGroupRev2. The following have been obsoleted cGtpT3TunnelTimer, cGtpMIBComplianceRev2, cGtpConfigurationsGroupRev1, cGtpStatusGroupRev1.
2002-03-08 16:00
Added the object cGtpGSNVersion to the cGtpGSNTable. Deprecated the object cGtpT3TunnelTimer.
2001-09-13 15:35
Modified the default value for cGtpMaximumPdps from 1000 to 10000. Added 'gtpdirector' to the enumeration of cGtpService. The APN identifies whether the network is corporate or service provider network. The Single Access point feature enables the service provider to add new access-points to the GGSN without having to provision the HLR. The requests are sent by the SGSN to the same virtual APN. A virtual APN is not associated with any actual physical network. The GGSN processes the request and forwards the packet to the appropriate access-point that is specified in the PCO. This feature is supported only in Cisco GGSNs. The purpose of the GTP-Director is to provide a mechanism for service providers using non-Cisco GGSN to use the Single APN feature. +==+ +===+ +====+ ==== +===+ +====+ +===+ |MS|--|BSS|--|SGSN|--|PLMN|--|GDM|--|GGSN|--Gi-|PDN| +==+ +===+ +====+ ==== +===+ +====+ +===+ | | | | +====+ | |___|GGSN|------Gi | +====+ | | | | +====+ +===+ |_____|GGSN|--Gi-|PDN| +====+ +===+ The GTP-Director also provides load balancing, using round robin mechanism, across GGSNs. The Cisco GGSNs may use the GTP-Director, but is not necessary as they can use IOS-SLB ( Server Load Balancing ).
2001-06-11 16:00
* Added cGtpDynamicEchoTimerEnable, cGtpDynamicEchoTimerMinTime, cGtpDynamicEchoTimerSmoothFactor. * Deprecated cGtpGSNTotalBandwidthResrc, cGtpPremiumQosMeanThroughput, cGtpNormalQosMeanThroughput, cGtpBestEffortQosMeanThroughput, cGtpCurrentUsedBandwidth.
2001-02-07 13:00
Initial version of this MIB module.