Hi,
Majority of modern smartphones from Sony, HTC, LG, Samsung, Nokia WP8.1 are
compliant with CLAT+NAT64/DNS/DNS64
Together with Michał Czerwonka we created document with mandatory IPv6
requirements, close cooperation with vendors succeeded and we managed to launch
first terminal (Xperia Z1) in September 2013, after 12 months we have 13% of
IPv6 only mobile users in a network. If you are mobile operator and you
thinking about IPv6 migration you won’t have any problems with Smartphones
(except Iphones=NO CLAT support) the way is paved for you...
1. Network Configuration (CLAT+NAT64+DNS)
Internet access is done by establishing one dedicated IPv6-only PDP/PDN
context, network supports 464xlat architecture with DNS Dual-Stack (DNS64
feature is available only for domain “ipv4only.arpa”) - RFC 6877. CLAT
implementation is mandatory for all devices
1. UE, CPE vendor IPv6 mandatory requirements
2.1.Dynamic IPv6 Address Allocation + IID randomly generated (privacy address)
+ UE shall use the IID given in PDP activation response message to configure
its LLA (3GPP TS
23.060<http://www.3gpp.org/ftp/Specs/archive/23_series/23.060>)
http://www.3gpp.org/ftp/Specs/archive/23_series/23.060/.
2.2.Customer Side Translator function (CLAT) must be embedded
(smartphone/tablet/router) as part of 464xlat architecture RFC 6877. The CLAT
must support ICMP, UDP, TCP, GRE and fragmented packet. clatd.conf - may be
generic where the domain for nat64 prefix discovery must be “ipv4only.arpa” –
static configuration may be required.
https://android.googlesource.com/platform/external/android-clat/
2.3.MTU size & device interfaces - If the network send MTU size in RA message,
then device must set it to the radio interface otherwise set the default
value=1500B. The CLAT demon will calculate MTU size automatically for its
interfaces (clat and clat4).
1. IPv6 tethering - the CLAT helps Dual Stack tethering solution both
USB/WIFI on the device , when APN is IPv6-only. The Global IPv6 and private
IPv4 (clat) must be enabled on tethered LAN.
http://tools.ietf.org/html/rfc7278 (scenario 2)
3.1.RA – device sends RA message to tethered host with Ipv6 prefix information.
Router lifetime set=9000 secs. Router sends periodically RA message – max.
value 9000 secs.
3.2.DHCPv6 – device server relays PCO Ipv6 DNS'es addresses to tethered hosts.
3.3.DHCPv4 – device server relays private IPv4 address and send DNS IPv4 (CLAT
DNS-proxy)
3.4.Tethering & MTU size – device propagates MTU size 1500B to tethered clients
interfaces ( Ipv4&Ipv6)
1. IPv6 LTE UE - the device must set EIT bit=1 in “Initial Attach” message.
Roaming - when APN with IPv6 protocol fails in roaming it must automatically
revert back APN protocol to IPv4
One thing is still missing – different APN profiles(APN name+PDP type) for
roaming –, there are two use cases:
Euinterent – (“EU Roaming Regulation III”) Internet APN available in UE
countries (VPLMN subscriber is allowed to use VGGSN APN)
“Roaming Fallback to IPv4” creating separate roaming profile with APN name/PDP
(now roaming fallback is based only on PDP type Android4.x/WP8.1)
Here are the benefits of extending APN profiles:
- APN profiles and its “zones” HPLMN/VPLMN can separate IPv6 form IPv4
- Separate APN for HPLMN (Ipv6 only APN for HPLMN)
- Separate APN for VPLMN roaming (fallback to IPv4 based on APN name)
- Euinternet APN as secondary roaming profile for manual selection
Best Regards,
Tomasz Kossut
From: Heatley, Nick [mailto:nick(_dot_)heatley(_at_)ee(_dot_)co(_dot_)uk]
Sent: Tuesday, October 07, 2014 11:31 AM
To: Lorenzo Colitti; IETF Discussion
Cc: v6ops(_at_)ietf(_dot_)org WG; IETF-Announce
Subject: Re: [v6ops] Last Call: <draft-ietf-v6ops-mobile-device-profile-13.txt>
(An Internet Protocol Version 6 (IPv6) Profile for 3GPP Mobile Devices) to
Informational RFC
2. I stand by my earlier assessment that this document's requirements are
over-broad, and in fact so broad as to harm adoption. There may well be
operators or device implementers that seeing with such a high number of
requirements may shy away in terror and think that deploying IPv6 in a mobile
network is an impossibly high amount of work. That said, given that this
document says clearly that it is not a standard, and that compliance is not
required, the harm it does will be limited.
There may well be operators and device implementers that see the many
individual “IPv6” RFCs and shy away. Transitioning technologies are still
perceived as issues for the network.
If this cross-operator document states what is required on terminals to work in
all major/predictable IPv6 scenarios, then it is giving such people a view of
what a “healthy and robust” terminal implementation would consist of. If they
are able to deliver on these requirements then they can supply a terminal ready
for all business areas /all operator network scenarios.
(It certainly stops the feedback I’ve had from certain corners “that no other
operators are asking for IPv6”, and “what you are asking for is a single
operator roadmap which we won’t do”. That has been the reality here). So I
don’t see how a consolidated demand-side view from operators who are really
trying to introduce IPv6 in mobile can harm adoption in any way.
Regards,
Nick
From: v6ops [mailto:v6ops-bounces(_at_)ietf(_dot_)org] On Behalf Of Lorenzo
Colitti
Sent: 06 October 2014 08:30
To: IETF Discussion
Cc: v6ops(_at_)ietf(_dot_)org<mailto:v6ops(_at_)ietf(_dot_)org> WG;
IETF-Announce
Subject: Re: [v6ops] Last Call: <draft-ietf-v6ops-mobile-device-profile-13.txt>
(An Internet Protocol Version 6 (IPv6) Profile for 3GPP Mobile Devices) to
Informational RFC
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