Re: [MEXT] IPv4 home address option in DSMIP
"Giaretta, Gerardo" <gerardog@qualcomm.com> Fri, 23 January 2009 16:28 UTC
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From: "Giaretta, Gerardo" <gerardog@qualcomm.com>
To: Hesham Soliman <hesham@elevatemobile.com>, Shi Xiaoyan <shi_xyan@huawei.com>
Date: Fri, 23 Jan 2009 08:27:34 -0800
Thread-Topic: [MEXT] IPv4 home address option in DSMIP
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Subject: Re: [MEXT] IPv4 home address option in DSMIP
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Errors-To: mext-bounces@ietf.org I agree with Hesham on this.
Gerardo > -----Original Message----- > From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On Behalf Of Hesham > Soliman > Sent: Thursday, January 22, 2009 8:18 PM > To: Shi Xiaoyan > Cc: mext@ietf.org > Subject: Re: [MEXT] IPv4 home address option in DSMIP > > > > > On 23/01/09 2:35 PM, "Shi Xiaoyan" <shi_xyan@huawei.com> wrote: > > > Hi Hesham, > > > > HA doesn't replace the BCE such as remove the old BCE and creat a new one > > when recieved BU. > > HA just update the option in BCE also included in BU and others option in > > BCE remain valid. > > > > Such as draft-ietf-monami6-multiplecoa-11, When multiple Binding Identifier > > mobility options are present in the Binding Update, it is treated as bulk > > registration. But not all BCE should be removed. Only when 'O' flag is set, > > HA remove all old BCE. > > => We've discussed this specific point for the MCoA draft and for flow > binding. Ryuji explicitly stated that they did modify the semantics of the > BU for that draft. Please review those exchanges to see the details. > > I don't see the need for doing what you suggested below because it adds > ambiguity and the benfits are minimal. Given this late stage I'm not in > favour of making further optimisations. No one else seems to express > opinions on this so my preference is to leave it as it is. > > > Hesham > > > > > Regards, > > Xiaoyan > > > > > >> -----Original Message----- > >> From: mext-bounces@ietf.org [mailto:mext-bounces@ietf.org] On > >> Behalf Of Shi Xiaoyan > >> Sent: Tuesday, January 20, 2009 6:06 PM > >> To: 'Hesham Soliman' > >> Cc: mext@ietf.org > >> Subject: Re: [MEXT] IPv4 home address option in DSMIP > >> > >> > >> > >>> -----Original Message----- > >>> From: Hesham Soliman [mailto:hesham@elevatemobile.com] > >>> Sent: Monday, January 19, 2009 8:04 PM > >>> To: Shi Xiaoyan > >>> Cc: mext@ietf.org > >>> Subject: Re: IPv4 home address option in DSMIP > >> > >>>> 1. BU without IPv4 home address option works well for extending > >>>> lifetime. I can't understand what you said "how a BU > >>> works". Is there > >>>> any Specification to require that BU for exending > >> lifetime must be > >>>> consistent with BU for first register? Is there any special > >>> effect? In > >>>> fact, with more and more extension for BU in future, the > >>> requirement > >>>> that BU for exending lifetime must be consistent with BU > >>> for first register will cause unnecessary load. > >>> > >>> => Yes I know that will use more bandwidth but I don't > >> understand what > >>> you're objecting to. Implementations copy the contents of > >> the new BU > >>> into the BC to replace the old entry, as specified in 3775. > >> So a new > >>> BU overwrites the old one unless you desgin a new option > >> per extension > >>> that tells the receiver to only refresh. > >>> > >> > >> In my opinion, re-registration BU should not include the IPv4 > >> HAO. Because re-registration BU with IPv4 HAO 1. Need more bandwidth. > >> 2. Cause extra load on HA. Because HA must verify if the > >> address in IPv4 HAO match that in BCE in order to avoid MN > >> use a unauthorized IPv4 address. > >> > >> In fact, since "the home agent MUST be able to find the IPv4 > >> home address of a mobile node when given the IPv6 home > >> address", section 5.5, why IPv4 HAO must be include in > >> re-registration BU? I can't find any benefit. > >> > >> I didn't find the description in 3775 for "a new BU > >> overwrites the old one". > >> It should be implementation issue. > >> It also could be done as that attributes in BCE also include > >> in re-registration BU should be overwriten and other > >> attribute not included in re-registration BU should remain valid. > >> > >> De-registration for IPv4 HoA can be done by adding a bit in > >> IPv4 HAO option for indicating de-registration, or any other > >> ways. It is all ok. > >> I just think it is unnecessary that re-registration BU > >> include the IPv4 HAO. > >> :-) > >> > >> > >> > >>>> > >>>> 2. We can find many other ways to delete the IPv4 binding > >> if it is > >>>> consensus that re-registration BU does not have to > >> include the IPv4 > >>>> HAO. It could not be a resason for re-registration BU must > >>> including IPv4 HAO. > >>> > >>> => Well, that's the reason now, if you have better ideas, > >> other than > >>> designing a new option per extension please send them to the list. > >>> This is already a bit late given that I'm making the last > >> update for > >>> IESG comments. > >>> > >>> Hesham > >>> > >>>> > >>>>> > >>>>> Hesham > >>>>> > >>>>>> > >>>>>> > >>>>>> Regards, > >>>>>> Xiaoyan > >>>>> > >>>> > >>>> Regards, > >>>> Xiaoyan > >>>> > >>> > >>> > >> > >> _______________________________________________ > >> MEXT mailing list > >> MEXT@ietf.org > >> https://www.ietf.org/mailman/listinfo/mext > > > > > _______________________________________________ > MEXT mailing list > MEXT@ietf.org > https://www.ietf.org/mailman/listinfo/mext _______________________________________________ MEXT mailing list MEXT@ietf.org https://www.ietf.org/mailman/listinfo/mext
- [MEXT] IPv4 home address option in DSMIP Shi Xiaoyan
- [MEXT] IPv4 home address option in DSMIP Shi Xiaoyan
- Re: [MEXT] IPv4 home address option in DSMIP Hesham Soliman
- Re: [MEXT] IPv4 home address option in DSMIP Shi Xiaoyan
- Re: [MEXT] IPv4 home address option in DSMIP Hesham Soliman
- Re: [MEXT] IPv4 home address option in DSMIP Shi Xiaoyan
- Re: [MEXT] IPv4 home address option in DSMIP Shi Xiaoyan
- Re: [MEXT] IPv4 home address option in DSMIP Hesham Soliman
- Re: [MEXT] IPv4 home address option in DSMIP Giaretta, Gerardo
- Re: [MEXT] IPv4 home address option in DSMIP Yungui Wang