Re: [MEXT] IPv4 home address option in DSMIP

> -----Original Message-----
> From: Hesham Soliman [mailto:hesham@elevatemobile.com] 
> Sent: Saturday, January 17, 2009 10:41 PM
> To: Shi Xiaoyan
> Cc: mext@ietf.org
> Subject: Re: IPv4 home address option in DSMIP
> 
> 
> On 17/01/09 7:17 PM, "Shi Xiaoyan" <shi_xyan@huawei.com> wrote:
> 

> 
> > I think it is redundant since only IPv6 HoA is the key for 
> BCE lookup. 
> > In maillist, I find some disscussion mails about this 
> quesion, but I 
> > can't find the reason why all BU must include IPv4 home 
> address option.
> 
> => Two reasons:
> 1. This is how a BU works, all options need to be included in 
> order for a binding to be refreshed 2. The only way the MN 
> can delete the IPv4 binding is to not include it in the BU. 

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.

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.

> 
> Hesham
> 
> >  
> > 
> > Regards,
> > Xiaoyan
> 

Regards,
Xiaoyan

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