最新IR.67 - DNS/ENUM Guidelines for Service Providers & GRX/IPX Providers

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IR.67 - DNS/ENUM Guidelines for Service Providers & GRX/IPX Providers

6.0

Table of Contents

IR.67 - DNS/ENUM Guidelines for Service Providers & GRX/IPX Providers. 1

6.0. 1

1 December 2011. 1

1
Introduction. 5

1.1
Overview.. 5

1.2
Scope. 5

1.3
Definition of Acronyms and Abbreviations. 5

1.4
Definition of Terms. 6

1.5
Document Cross-References. 7

2
DNS As Used on the GRX/IPX.. 9

2.1
Introduction. 9

2.2
Architecture. 9

2.3
Domains. 12

2.3.1
Introduction. 12

2.3.2
General
12

2.3.3
Domain names used on the GRX/IPX DNS.. 13

2.3.4
Domain names used on the Internet DNS (and owned by GSMA)
22

2.3.5
Domain names used on the GRX/IPX DNS for UNI
26

2.4
Non-service specific hostnames and domains. 29

3
General DNS Configuration for Service Providers. 30

3.1
Introduction. 30

3.2
DNS Server Hardware. 30

3.3
DNS Server Software. 30

3.4
DNS Server naming. 30

3.5
Domain Caching. 30

3.6
Reverse Mapping. 31

3.7
Use of DNS Interrogation Modes. 31

3.8
Use of the GRX/IPX Root DNS Server
32

3.9
Provisioning of Service Provider's DNS servers. 32

3.10
Resource Records. 32

3.11
Support for IPv4 and IPv6. 32

4
DNS Aspects for Standardised Services. 33

4.1
Introduction. 33

4.2
General Packet Radio Service (GPRS)
33

4.2.1
Introduction. 33

4.2.2
APN resolution in PDP Context activation. 33

4.2.3
Inter‑SGSN handovers for active PDP Contexts. 35

4.3
Multi‑media Messaging Service (MMS)
36

4.3.1
Introduction. 36

4.3.2
MM delivery based on MSISDN for the Direct Interconnect model
37

4.3.3
MM delivery based on MSISDN for the Indirect Interconnect model
38

4.3.4
MM delivery based on NAI/e-mail address. 39

4.4
WLAN Inter‑working. 39

4.4.1
Introduction. 39

4.5
IP Multi‑media core network Sub‑system (IMS)
40

4.5.1
Introduction. 40

4.5.2
SIP server configuration. 41

4.5.3
Domain Names used. 43

4.6
Generic Authentication Architecture (GAA)
43

4.6.1
Introduction. 43

4.7
Generic Access Network (GAN)
43

4.7.1
Introduction. 43

4.8
Secure User Plane Location (SUPL)
44

4.8.1
Introduction. 44

4.9
Enhanced Packet Core (EPC)
44

4.9.1
Introduction. 44

4.10
IMS Centralised Services (ICS)
44

4.10.1
Introduction. 44

4.11
Access Network Discovery Support Function (ANDSF)
44

4.11.1
Introduction. 44

4.12
Mobile Broadcast Services (BCAST)
44

4.12.1
Introduction. 44

4.13
The XCAP Root URI on Ut Interface for MMTEL/IMS profile for Voice and SMS (XCAP)
45

4.13.1
Introduction. 45

5
E.164 Number Translation. 45

5.1
Introduction. 45

5.2
General Requirements. 46

5.3
Architecture. 47

5.3.1
Introduction. 47

5.3.2
Data Delegation Structure. 47

5.3.3
Resolution procedure. 49

5.3.4
Access to ENUM servers and Interconnection policy. 50

5.3.5
Number Portability considerations. 51

5.4
Technical Requirements. 51

5.4.1
Introduction. 51

5.4.2
ENUM Query. 51

5.4.3
ENUM Response. 52

6
Processes and Procedures relating to DNS.. 55

6.1
Introduction. 55

6.2
Existing domains/sub-domains on the GRX/IPX network and their Allocation. 55

6.3
Procedures relating to new domain names on the GRX/IPX network. 56

7
Annex A: Sample BIND DNS Configuration for GPRS.. 56

7.1
Introduction. 56

7.2
The "named.conf" file. 57

7.2.1
The "named.conf" file for a PLMN Master Nameserver
57

7.2.2
The "named.conf" file for a PLMN Slave Nameserver
58

7.3
Zone Configuration Files. 58

7.3.1
The "gprs.hint" file. 58

7.3.2
The "0.0.127.in-addr.arpa" file. 59

7.3.3
PLMN zone files. 59

7.3.4
The "hosts" file. 59

7.3.5
The "168.192.in-addr.arpa" file. 61

8
ANNEX B: Alternative ENUM Architecture: Multiple Root Model
62

8.1
Introduction. 62

8.2
Architecture. 62

8.3
Resolution. 64

8.4
Access to ENUM Servers. 65

8.5
Interworking with the preferred model
66

9
Annex C: Solving Number Portability in ENUM.. 67

9.1
Introduction. 67

9.2
Option 1 – Central authoritative database. 67

9.2.1
Description. 67

9.2.2
Example Configuration. 67

9.2.3
Advantages and Disadvantages. 67

9.2.4
Suitability. 67

9.3
Option 2 – Change of domain name in URIs/URLs in Tier‑2. 68

9.3.1
Description. 68

9.3.2
Example. 68

9.3.3
Advantages and Disadvantages. 68

9.3.4
Suitability. 68

9.4
Option 3 – Redirection at Tier 2. 69

9.4.1
Description. 69

9.4.2
Example. 69

9.4.3
Advantages and Disadvantages. 70

9.4.4
Suitability. 70

9.5
Option 4 – Central redirection database. 70

9.5.1
Description. 70

9.5.2
Example. 70

9.5.3
Advantages and Disadvantages. 71

9.5.4
Suitability. 72

10
Document Management
73

10.1
Document History. 73

10.2
Other Information. 78