Cisco ASR 5000 Series, Обзор продукта

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Mobility Management Entity Overview
▀ Features and Functionality - Licensed Enhanced Feature Software
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
Task recovery mode : Wherein one or more session manager failures occur and are recovered without the need
to use resources on a standby packet processing card. In this mode, recovery is performed by using the
mirrored ―standby-mode‖ session manager task(s) running on active packet processing cards. The ―standby-
mode‖ task is renamed, made active, and is then populated using information from other tasks such as AAA
manager.
Full packet processing card recovery mode : Used when a PSC or PSC2 hardware failure occurs, or when a
packet processing card migration failure happens. In this mode, the standby packet processing card is made
active and the ―standby-mode‖ session manager and AAA manager tasks on the newly activated packet
processing card perform session recovery.
Session/Call state information is saved in the peer AAA manager task because each AAA manager and session manager
task is paired together. These pairs are started on physically different packet processing cards to ensure task recovery.
Important:
For more information on session recovery support, refer Session Recovery chapter in System
Enhanced Feature Configuration Guide .
License
600-00-7513, 600-00-7546, 600-00-7552, 600-00-7554
IPv6 Support
This feature allows IPv6 subscribers to connect via the GPRS/UMTS infrastructure in accordance with the following
standards:
RFC 2460: Internet Protocol, Version 6 (IPv6) Specification
RFC 2461: Neighbor Discovery for IPv6
RFC 2462: IPv6 Stateless Address Autoconfiguration
RFC 3314: Recommendations for IPv6 in 3GPP Standards
RFC 3316: Internet Protocol Version 6 (IPv6) for Some Second and Third Generation Cellular Hosts
RFC 3056: Connection of IPv6 domains via IPv4 clouds
3GPP TS 23.060: General Packet Radio Service (GPRS) Service description
3GPP TS 27.060: Mobile Station Supporting Packet Switched Services
3GPP TS 29.061: Interworking between the Public Land Mobile Network (PLMN) supporting Packet Based
Services and Packet Data Networks (PDN)
The MME allows an APN to be configured for IPv6 EPS Bearer contexts. Also, an APN may be configured to
simultaneously allow IPv4 EPS Bearer contexts.
The MME supports IPv6 stateless dynamic auto-configuration. The mobile station may select any value for the interface
identifier portion of the address. The link-local address is assigned by the MME to avoid any conflict between the
mobile station link-local address and the MME address. The mobile station uses the interface identifier assigned by the
MME during the stateless address auto-configuration procedure. Once this has completed, the mobile can select any