Cisco Cisco IOS Software Release 12.3(2)XF 集約されたデータ
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APN-Based Features
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Mapping multiple APNs to a single virtual routing/forwarding (VRF) instance—Cisco GGSN Release 5.2 supports more than one APN per VRF
instance.
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Enabling charging per APN—Cisco GGSN Release 5.2 allows the generation of CDRs per APN to be enabled or disabled. This feature is part of
the charging enhancements.
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Rate limiting for users per APN—This feature allows a controlled distribution of bandwidth per APN. Some APNs may be recognized as those
used for bandwidth-intensive applications, such as MP3 file hosts, or other locations where image files or large file sizes are involved. Cisco
GGSN Release 5.1 is configurable on a per-APN basis to restrict the transfer rate per subscriber to an operator-defined limit that reduces the
chance of a node being congested, thereby increasing its availability. This is also part of the Call Admission Control (CAC) and per-PDP
policing feature suite.
GGSN Release 5.1 is configurable on a per-APN basis to restrict the transfer rate per subscriber to an operator-defined limit that reduces the
chance of a node being congested, thereby increasing its availability. This is also part of the Call Admission Control (CAC) and per-PDP
policing feature suite.
Security Enhancements
Support of multiple trusted public LAN mobile network (PLMN) IDs—Access to certain partner roaming mobile stations is allowed; by default,
other roamers will be blocked on an APN basis. This allows the operators to provision access based on partner agreements. Cisco GGSN Release
5.2 allows more than one trusted PLMN ID. This allows operators to form multiple alliances when they do not want the mobile stations from their
partners to be blocked because they do not belong to the home PLMN that the GGSN belongs to. This feature allows the operator to configure
multiple trusted mobile country codes and mobile network codes (MCC/MNCs).
Operation and Maintenance Features
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Maintenance mode—Cisco GGSN Release 5.2 allows APN configuration when there are active PDP contexts. It allows operators to change the
APN configuration in real time, without tearing down any active PDP contexts on that APN.
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Preventing generation of CDRs for active PDP contexts—Deactivation of G-CDR generation for an active PDP context. With this feature,
customers should be able to stop generation of G-CDRs when a PDP context is active, without tearing down the PDP context to be able to do
this. This is related to the above maintenance mode feature for allowing APN configuration for active PDP contexts.
this. This is related to the above maintenance mode feature for allowing APN configuration for active PDP contexts.
Policy Enforcement/IMS Enabling Features
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UMTS CAC—UMTS CAC is used by the GGSN admission decisions based on the network resource availability and the policy set by the Policy
Decision Function (PDF) in case of IMS subsystem implementation. It can also downgrade a service if the policy parameters from the PDF do not
match those from the serving GPRS support node (SGSN). CAC is based on the parameters configured in the APN, such as maximum activated
PDP, maximum bitrate, or guaranteed bitrate, as well as the bandwidth allocated to a particular traffic class the PDP belongs to.
match those from the serving GPRS support node (SGSN). CAC is based on the parameters configured in the APN, such as maximum activated
PDP, maximum bitrate, or guaranteed bitrate, as well as the bandwidth allocated to a particular traffic class the PDP belongs to.
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Per-PDP policing—Cisco GGSN Release 5.2 supports per-PDP policing to limit downlink traffic at the Gi interface. If the bandwidth is exceeded
on a PDP context, packets may be dropped or assigned a higher drop precedence value.
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Rate limiting for PDPs per APN—Cisco GGSN Release 5.2 allows operators to configure rate (bandwidth) thresholds per APN.
L2TP Extension on Gi Interface for PPP PDP Type
GTP is used between the SGSN and GGSN to tunnel various data protocols through the GPRS backbone. The PPP PDP type traffic from the mobile
station is processed at the GGSN, where the PPP sessions are terminated. The GGSN then transports the traffic over L2TP and routes it over the Gi
interface to its destination. This feature requires the mobile station to support PPP PDP type.
PPP PDP Type Terminated in GGSN
The mobile station can send IP traffic encapsulated as PPP sessions all the way to the GGSN. There, the PPP sessions are terminated, and the IP
packets are routed over the Gi interface to their destinations. This feature requires the mobile station to support PPP PDP type.