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MME Administration Guide, Staros Release 21.24 MME Administration Guide, StarOS Release 21.24 First Published: 2021-06-30 Americas Headquarters Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000 800 553-NETS (6387) Fax: 408 527-0883 THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS. THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB's public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California. NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS" WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE. IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Any Internet Protocol (IP) addresses and phone numbers used in this document are not intended to be actual addresses and phone numbers. Any examples, command display output, network topology diagrams, and other figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses or phone numbers in illustrative content is unintentional and coincidental. All printed copies and duplicate soft copies of this document are considered uncontrolled. See the current online version for the latest version. Cisco has more than 200 offices worldwide. Addresses and phone numbers are listed on the Cisco website at www.cisco.com/go/offices. Cisco and the Cisco logo are trademarks or registered trademarks of Cisco and/or its affiliates in the U.S. and other countries. To view a list of Cisco trademarks, go to this URL: https://www.cisco.com/c/en/us/about/legal/trademarks.html. Third-party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1721R) © 2021 Cisco Systems, Inc. All rights reserved. CONTENTS PREFACE About this Guide li Conventions Used li Supported Documents and Resources lii Related Common Documentation lii Related Product Documentation lii Obtaining Documentation liii Contacting Customer Support liii CHAPTER 1 Mobility Management Entity Overview 1 Product Description 1 Qualified Platforms 3 Licenses 3 Network Deployment and Interfaces 3 MME in the E-UTRAN/EPC Network 3 Supported Logical Network Interfaces (Reference Points) 5 Features and Functionality - Base Software 11 3GPP R8 Identity Support 12 ANSI T1.276 Compliance 12 APN Restriction Support 13 Authentication and Key Agreement (AKA) 13 Backup and Recovery of Key KPI Statistics 13 Bulk Statistics Support 14 Cell Broadcast Center - SBc Interface 15 Closed Subscriber Groups 15 Co-Located SPGW Selection for Emergency Bearer 15 Congestion Control 16 MME Administration Guide, StarOS Release 21.24 iii Contents Controlling Voice Over PS Session in S1 Mode 16 Define Same TAI in Multiple TAI Lists 17 Delay Value IE Support in MME 17 eCGI in PLA/RR Messages 18 Emergency Call Release 18 Emergency Session Support 18 EPS Bearer Context Support 19 EPS GTPv2 Support on S11 Interface 19 ERAB Setup Retry Handling 20 Handling the TAU and Location Update Request/Response 20 HSS Support Over S6a Interface 21 IE-Extension Support for Bearers SubjectToStatusTransfer_Item 21 IMSI Manager Scaling 22 Inter-MME Handover Support 23 Interworking Support 23 Interworking with SGSNs 23 Handover Support for S4-SGSNs 24 Unoptimized Non-3GPP Handover Support 24 IPv6 PDN Type Restriction 25 IPv6 Support 26 MME Interfaces Supporting IPv6 Transport 27 Load Balancing 27 Load Re-balancing 27 Local Cause Code Mapping 28 Management System Overview 28 MME Double Counting Statistics of DECOR Rerouted Attach Accept 28 MMEMgr Scaling to Support VPC-DI and USP 28 MME Pooling 29 MME Selection 29 Mobile Equipment Identity Check 30 Mobility Restriction 30 Handover Restriction 30 Regional Zone Code Restriction 30 Monitor Protocol Support for DCNR 30 MME Administration Guide, StarOS Release 21.24 iv Contents Multiple PDN Support 31 NAS Protocol Support 31 EPS Mobility Management (EMM) 31 EPS Session Management (ESM) 31 NAS Signaling Security 31 NB-IOT EDRX Supported values in ATTACH/TAU Accept 32 Network Sharing 32 Operator Policy Support 32 Operator Policy Selection Based on IMEI-TAC 33 Overload Control 33 PDN Type Control 33 Packet Data Network Gateway (P-GW) Selection 34 Radio Resource Management Functions 34 RAN Information Management 34 Reachability Management 35 SCTP Multi-homing Support 35 Serving Gateway Pooling Support 35 Serving Gateway Selection 35 Session and Quality of Service Management 36 Session Tracing 36 State-Location Information Retrieval Flag 36 Target Access Restricted for the Subscriber Cause Code 37 Threshold Crossing Alerts (TCA) Support 37 Tracking Area List Management 38 UMTS to LTE ID Mapping 38 VoLTE Offloading 39 VoLTE Support based on UEs SRVCC Capability 39 Features and Functionality - Licensed Enhanced Feature Software 40 Feature Description 40 Attach Rate Throttling 40 Cell Traffic Trace 41 CSFB and SMS over SGs Interface 41 CSFB and SRVCC for CDMA 41 Customized Inter-MME SGW S1-Handover and TAU Procedure for PS-LTE Support 42 MME Administration Guide, StarOS Release 21.24 v Contents DDN Throttling 42 Enhanced Congestion Control and Overload Control 42 Feature Description 43 HSS-based P-CSCF Restoration 43 Idle-mode Signaling Reduction 44 IP Security (IPSec) 44 IPNE Service Support 45 Lawful Intercept 46 Location Services 46 MBMS for MME (eMBMS) 46 MME Handling of PGW Restart 46 MME Message Rate Control 48 S1 Paging Rate Limit 48 Pacing UE Deactivation 48 MME Restoration - Standards Extension 48 MME/VLR Restoration Procedure via Alternate MME 49 ULA for Periodic TAU when VLR Inaccessible 49 MTC Features 49 Network Provided Location Info for IMS 49 Optimized Paging Support 50 Overcharging Protection 51 Operator Specific QCI 51 Separate Configuration for GTPC Echo and GTPC Non-Echo Messages 51 Session Recovery Support 51 SGSN-MME Combo Optimization 52 Single Radio Voice Call Continuity Support 52 MSC Fallback on Sv Interface 52 Subscribed Periodic TAU Timer 53 Support for Reject Causes with MM and SM Back Off Timers 53 User Location Information Reporting 55 VLR Management 56 How the MME Works 57 EPS Bearer Context Processing 57 Purge Procedure 57 MME Administration Guide, StarOS Release 21.24 vi Contents Paging Procedure 57 Subscriber-initiated Initial Attach Procedure 57 Subscriber-initiated Detach Procedure 61 Service Request Procedures 62 UE-initiated Service Request Procedure 62 Network-initiated Service Request Procedure 64 Supported Standards 66 3GPP References 66 IETF References 68 Object Management Group (OMG) Standards 71 CHAPTER 2 Mobility Management Entity Configuration 73 Configuring the System as a Standalone MME (base configuration) 74 Information Required 74 Required MME Context Configuration Information 74 Required MME Policy Configuration Information 78 How This Configuration Works 79 MME Configuration 80 Creating and Configuring the MME Context and Service 81 Creating and Configuring the eGTP Service and Interface Association 82 Creating and Configuring the HSS Peer Service and Interface Associations 82 Configuring Dynamic Destination Realm Construction for Foreign Subscribers 83 Configuring Optional Features on the MME 85 Configuring Differentiation Between HeNB-GW and eNodeBs 85 Configuring Dual Address Bearers 85 Configuring Dynamic Peer Selection 86 Configuring Emergency Session Support 86 Configuring ESM T3396 Timer 87 Configuring Gn/Gp Handover Capability 88 Configuring Inter-MME Handover Support 89 Configuring X.509 Certificate-based Peer Authentication 90 Configuring Dynamic Node-to-Node IP Security on the S1-MME Interface 91 Creating and Configuring an IPSec Transform Set 91 Creating and Configuring an IKEv2 Transform Set 91 MME Administration Guide, StarOS Release 21.24 vii Contents Creating and Configuring a Crypto Template 92 Binding the S1-MME IP Address to the Crypto Template 92 Configuring ACL-based Node-to-Node IP Security on the S1-MME Interface 93 Creating and Configuring a Crypto Access Control List 93 Creating and Configuring an IPSec Transform Set 93 Creating and Configuring an IKEv2 Transform Set 94 Creating and Configuring a Crypto Map 94 Configuring Mobility Restriction Support 95 Configuring Inter-RAT Handover Restrictions on the MME 95 Configuring Location Area Handover Restrictions on the MME 96 Configuring Tracking Area Handover
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