Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-analysis
"Rajiv Asati (rajiva)" <rajiva@cisco.com> Thu, 01 August 2013 20:43 UTC
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From: "Rajiv Asati (rajiva)" <rajiva@cisco.com>
To: "cb.list6" <cb.list6@gmail.com>
Thread-Topic: [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-analysis
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Date: Thu, 01 Aug 2013 20:43:18 +0000
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Cc: IPv6 Ops WG <v6ops@ietf.org>, "draft-chen-v6ops-ipv6-roaming-analysis@tools.ietf.org" <draft-chen-v6ops-ipv6-roaming-analysis@tools.ietf.org>
Subject: Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-analysis
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Cameron, Thanks for the details. Is there an implicit assumption that the roaming partners' backend system understands v6 PDP, but not v4v6 PDP? Cheers, Rajiv -----Original Message----- From: Cameron Byrne <cb.list6@gmail.com> Date: Monday, July 29, 2013 3:59 PM To: Rajiv Asati <rajiva@cisco.com> Cc: "Fred Baker (fred)" <fred@cisco.com>, "v6ops@ietf.org" <v6ops@ietf.org>, "draft-chen-v6ops-ipv6-roaming-analysis@tools.ietf.org" <draft-chen-v6ops-ipv6-roaming-analysis@tools.ietf.org> Subject: Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-analysis >Rajiv > >On Mon, Jul 29, 2013 at 12:00 PM, Rajiv Asati (rajiva) <rajiva@cisco.com> >wrote: >> Hi Cameron, >> >> Could you please share more details about 3a and 3b below? >> >> > >Can you be more specific about the question? > >Charging systems have a hard time to reconcile usage from 2 PDP >because they are 2 separate CDRs, 1 for each PDP. Also, 2 PDP is 2x >as expensive in terms of signalling and licensing. > >v4v6 as single PDP is not viable because not everything supports >release 8 in the GSM/3GPP ecosystem. I tried to enable v4v6 for my >subscribers in my central database (HLR/HSS), and adding this >capability to all my subscribers made some existing ipv4 roaming >subscribers fail. Why? Because when my users attach into a roaming >partner network, their network downloads the capabilities of the >subscriber from my database (HLR/HSS)... and if one of the >capabilities includes v4v6, then the roaming partners's equipment >drops the users because they don't understand this term. > >This is a roaming partner network device acting in a bad and >non-standard way. It's a shame i have to turn off v4v6 globally >because of this issue. There is one subscriber database, and because >some roaming partner gear fails, it is not safe to turn anywhere. One >remediation is to limit attributes based on a whitelist / blacklist, >but this is not feature available today. > >Luckily, the good people of v6ops have approved RFC6877 and Android >implemented it in 4.3 , so single v6 PDP works ok. > > >> WOuldn't the UE fallback to v4 PDP, if v4v6 PDP wasn't available? >> > >Yes, it's supposed to work that way. But, keep in mind what i said >above. In the real world, it does not (for now, once everyone >upgrades maybe this wont be a problem). > >Cameron > >> Cheers, >> Rajiv >> >> -----Original Message----- >> From: Cameron Byrne <cb.list6@gmail.com> >> Date: Sunday, July 28, 2013 11:48 AM >> To: "Fred Baker (fred)" <fred@cisco.com> >> Cc: "v6ops@ietf.org" <v6ops@ietf.org>, >> "draft-chen-v6ops-ipv6-roaming-analysis@tools.ietf.org" >> <draft-chen-v6ops-ipv6-roaming-analysis@tools.ietf.org> >> Subject: Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-analysis >> >>>As general feedback >>> >>>1. As others have noted, it is important to clarify that home routed >>>is the default case and local-breakout is only relavent for IMS, but >>>IMS based roaming and local breakout is yet to see its first >>>deployment, and may still be years in the future for roaming to work >>>this way. So, local breakout is not a real case and seems to be >>>causing more confusion. >>> >>>2. There is a hazard in assuming the well known prefix is always >>>available. Any device should not assume the well known prefix is >>>available. This is essentially a misconfiguration that should not >>>occur. >>> >>>3. What i have learned >>> >>>a. dual-stack 2 PDP will never work, charging issues in the billing >>>system, and too much capacity wasted for no real gain >>> >>>b. dual-stack 1 PDP (v4v6) will not work any time soon. Enabling >>>this feature in the HSS/HLR breaks roaming and there is no way to >>>ensure this issue is fixed in the hundreds of networks that are >>>potentially impacted. There are some backs to do on the home network >>>that can make this easier but not exposing partner networks to the new >>>release 8 features. >>> >>>c. What does work and adds value (saves IPv4 address for the common >>>case of not-roaming) : IPv6-only single PDP 464XLAT on the home >>>network, IPv4-only single PDP when roaming. This is how i am moving >>>forward. The when at home, the UE has default configs for ipv6-only >>>and when roaming the ue only attempts to connect using IPv4. This >>>gets the vast majority of users in my home network off v4 and keeps >>>ipv4 for the complicated yet relatively small percentage of roaming >>>users. >>> >>> >>> >>>On Tue, Jul 9, 2013 at 5:45 AM, <fred@cisco.com> wrote: >>>> >>>> A new draft has been posted, at >>>>http://tools.ietf.org/html/draft-chen-v6ops-ipv6-roaming-analysis. >>>>Please take a look at it and comment. >>>> _______________________________________________ >>>> v6ops mailing list >>>> v6ops@ietf.org >>>> https://www.ietf.org/mailman/listinfo/v6ops >>>_______________________________________________ >>>v6ops mailing list >>>v6ops@ietf.org >>>https://www.ietf.org/mailman/listinfo/v6ops >>
- [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-… fred
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Alexis Munoz (Gmail)
- [v6ops] new draft: draft-chen-v6ops-ipv6-roaming-… fred
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Tore Anderson
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GT RAMIREZ, Medel G.
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Victor Kuarsingh
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Tore Anderson
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… david.binet
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… holger.metschulat
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… cb.list6
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… cb.list6
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- [v6ops] ODP: new draft: draft-chen-v6ops-ipv6-roa… Czerwonka Michał - Hurt TP
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… GangChen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Lorenzo Colitti
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Jouni Korhonen
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Rajiv Asati (rajiva)
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… cb.list6
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Heatley, Nick
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… cb.list6
- Re: [v6ops] new draft: draft-chen-v6ops-ipv6-roam… Rajiv Asati (rajiva)