Re: [MEXT] Home Agent Switch Message (RFC 5142) and DSMIP

[Vijay Devarapalli <vijay at wichorus.com>]

On 10/31/08 7:09 AM, "Brian Haley" <brian.haley at hp.com> wrote:

> Vijay Devarapalli wrote:
>> Brian Haley wrote:
>>> Vijay,
>>> 
>>> Wouldn't a new DSMIP companion document just define a new mobility
>>> option to use with HA Switch and how it should be used?  I wouldn't
>>> think we'd revise 5142 to add DSMIP-specific content to it.
>> 
>> That will result in two documents for the same purpose. We should avoid
>> that. I don't see any issue with 5142bis talking about the IPv4 home
>> agent address.
> 
> But with that logic we'd update 3775 every time we had a new mobility
> option, and we don't do that.  I'd prefer a separate document.

In general, if it is a new feature, we should standardize it in a separate
document. In this case, we just want the ability to carry the HA IPv4
address in an existing message. 5142 is already a very simple short spec,
revising it wouldn't take much effort. Since we are adding a mobility
option, it would be backward compatible with implementations that are out
today that implement 5142.

Vijay

> 
> -Brian
> 
> 
>>> Vijay Devarapalli wrote:
>>>> Hi Christian,
>>>> 
>>>> RFC 5142 was done a while ago. To able to re-direct the mobile node
>>>> to an IPv4 address of the home agent, we need to revise RFC 5142. I
>>>> can do that, if there is interest.
>>>> 
>>>> Vijay
>>>> 
>>>> Christian.Kaas-Petersen at tietoenator.com wrote:
>>>>> The home agent switch message allows a home agent to inform the
>>>>> mobile node, that the mobile node should deregister from the home
>>>>> agent, and register with some other home agent.  The address of this
>>>>> other home agent is supplied in the home agent switch message.
>>>>> The address in an IPv6 address.  If the home agent supports DSMIP,
>>>>> the home agent should also provide an IPv4 address.  Isn't there a
>>>>> need for an extention, such that the home agent's IPv4 address
>>>>> can be given to the mobile node?
>>>>> 
>>>>> Christian
>> 

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