This document discusses Telstra's experience and strategy for migrating to IPv6. It covers their dual-stack implementation on iPads which led to increased IPv6 usage without users noticing. It also discusses using DNS64 as a transition step to single stack and challenges around tethered devices, internal services, and VPNs. The document outlines a device-by-device migration strategy starting with common devices and trials before enabling single stack and tethering support. It emphasizes engaging customers early in the process and keeping management informed of metrics like service incidents and bandwidth usage.

1. Telstra Unrestricted Copyright Telstra©
IPv6 Readiness
APRICOT 2018 – February 2018

2. Jeff Schmidt- Technology Team Manager, Telstra Wireless
Network Engineering
Manager responsible for Wireless IPv6 deployment and
Wireless Mobile IP Edge/Core Architecture
Introduction
Instructional Slide

3. Business and
Technical Considerations

4. Business and Technical
Considerations
Non-interworking
private IPv4 address
ranges duplicated
between domains, that
now require
interworking
10.0.0.0 10.0.0.0
10.0.0.0 10.0.0.0

5. Network Architectures

6. • CGN performs NAT/PAT 44 and NAT/PAT 64
PAT substantially reduces Public and Private IPv4 address
demand, but does not prevent IPv4 address depletion.
IPv6 Implementation
Centralised CGN
Internet
IP Core / Edge
Internet
CGNAT BR
Region 1
Region 2
NAT/PAT 44
Private IPv4 to Public IPv4
CGNAT BR
NAT/PAT 64
Public IPv6 to Public IPv4
Backhaul
EPG
Backhaul
EPG

7. Our Experience

8. iPad Dual-Stack Carrier Settings
Significant IPv6 takeup on iPads since carrier update was made
available with Dual-Stack.
Update made via iOS patch. Users are not immediately aware IPv6 is
available on their iPads. Transparent migration.
IPv6 take up occurs when iPads are patched to the latest version
Single Stack will come later this year
Our Experience

9. Use DNS64 as a migration step from dual stack to single stack
Dual stack devices without DNS64 are least impacted with a migration towards single stack as
applications will continue to use IPv4
Enabling DNS64 will extend IPv6 usage for the devices and can be disabled easily if customers
applications are impacted
The number applications, protocols and specific implementations continues to make a
migration to IPv6 single stack a challenge
Check NGP / SMP behaviour
Our Experience

10. Tethered devices to remain on DS APN for time being
Ensure all internal services IPv6 enabled
464xlat – is it still required ? H323 breaks but is it required ?
Corporate VPNs are a challenge due to range of solutions and specific implementations
Test via test APNs
Our Experience

11. Our Experience
Step
increases in
IPv6 address
usage as
device types
move to
IPv6 ie iPad
dual stack
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NSW QLD SA VIC WA Total
telstra.wap - IPv6 Usage

12. More
devices built
to support
VoLTE on by
default

13. Mail services failing ie smtp
IPv6 smtp packets not leaving PGW, IPv4 service works – PGW bug ?
Bugs relating to IPv6 are becoming less common
Our Experience

14. APN can control IPv4, IPv6 or dual stack services
Some wireless devices restrict the use of APNs to control access to
services ie wholesale products, corporate access
Ensure device testing validates access to various differentiated services
from various device types, don’t assume APN control is available
through device
Our Experience

15. Device by device migration via carrier configuration
Test APN, internal trials
Dual stack on a single device type
Turn on DNS64
Single stack on a less common device ie android device type x
Tethering APN last as there less control over applications and OS
running on tethered devices
Migration Strategy to get to IPv6 single stack

16. Engage the community early so they know what’s coming. They will appreciate you are still developing
and they will want to be part of the journey!
We receive support email through our contact points and reply as soon as possible. Don’t keep your
customers waiting
Skip the red tape – let customers engage engineering directly
Keep management happy! Report SIO and bandwidth usage!
Customer Support

17. Q&A

18. CONTACT

19. Jeff Schmidt
Technology Team Manager
Telstra Wireless Network Engineering
jeff.schmidt@team.telstra.com
Contact