Cisco Cisco Packet Data Gateway (PDG) Guia De Resolução De Problemas
GGSN Support in GPRS/UMTS Wireless Data Services
▀ Features and Functionality - Base Software
▄ Cisco ASR 5000 Series Gateway GPRS Support Node Administration Guide
OL-22943-01
Quality of Service Support
Provides operator control over the prioritization of different types of traffic.
Quality of Service (QoS) support provides internal processing prioritization based on needs, and DiffServ remarking to
allow external devices to perform prioritization.
allow external devices to perform prioritization.
I
MPORTANT
:
The feature described here is internal prioritization and DiffServ remarking for external
External prioritization (i.e., the value to use for the DiffServ marking) is configured for the uplink and downlink
directions. In the uplink direction, each APN is configurable for the DiffServ ToS value to use for each of the 3GPP
traffic classes. Alternatively, you can configure “pass-through”, whereby the ToS value will pass through unchanged.
directions. In the uplink direction, each APN is configurable for the DiffServ ToS value to use for each of the 3GPP
traffic classes. Alternatively, you can configure “pass-through”, whereby the ToS value will pass through unchanged.
In the downlink direction, the ToS value of the subscriber packet is not changed, but you can configure what to use for
the ToS value of the outer GTP tunnel. The value for ToS is configurable for each of the 3GPP traffic classes. In
addition, the connections between the GGSN and one or more SGSNs can be configured as a “GGSN Service”, and
different values for ToS for the same 3GPP traffic class may be configured for different GGSN Services.
the ToS value of the outer GTP tunnel. The value for ToS is configurable for each of the 3GPP traffic classes. In
addition, the connections between the GGSN and one or more SGSNs can be configured as a “GGSN Service”, and
different values for ToS for the same 3GPP traffic class may be configured for different GGSN Services.
RADIUS Support
Provides a mechanism for performing authorization, authentication, and accounting (AAA) for subscriber PDP contexts
based on the following standards:
based on the following standards:
RFC-2618, RADIUS Authentication Client MIB, June 1999
RFC-2620, RADIUS Accounting Client MIB, June 1999
RFC-2865, Remote Authentication Dial In User Service (RADIUS), June 2000
RFC-2866, RADIUS Accounting, June 2000
RFC-2867, RADIUS Accounting Modifications for Tunnel Protocol Support, June 2000
RFC-2868, RADIUS Attributes for Tunnel Protocol Support, June 2000
RFC-2869, RADIUS Extensions, June 2000
The Remote Authentication Dial-In User Service (RADIUS) protocol is used to provide AAA functionality for
subscriber PDP contexts. (RADIUS accounting is optional since GTPP can also be used.)
subscriber PDP contexts. (RADIUS accounting is optional since GTPP can also be used.)
Within context contexts configured on the system, there are AAA and RADIUS protocol-specific parameters that can be
configured. The RADIUS protocol-specific parameters are further differentiated between RADIUS Authentication
server RADIUS Accounting server interaction.
configured. The RADIUS protocol-specific parameters are further differentiated between RADIUS Authentication
server RADIUS Accounting server interaction.
Among the RADIUS parameters that can be configured are:
Priority: Dictates the order in which the servers are used allowing for multiple servers to be configured in a
single context.
Routing Algorithm: Dictate the method for selecting among configured servers. The specified algorithm
dictates how the system distributes AAA messages across the configured AAA servers for new sessions. Once
a session is established and an AAA server has been selected, all subsequent AAA messages for the session
will be delivered to the same server.
a session is established and an AAA server has been selected, all subsequent AAA messages for the session
will be delivered to the same server.