Re: [MEXT] DSMIPv6 deregistration

[Sri Gundavelli <sgundave at cisco.com>]

On Wed, 25 Jun 2008, Vijay Devarapalli wrote:

> > What will be the key for the binding lookup ? If the
> > entries are kept seperate, is the v4 HoA not required ?
>
> If you have two separate bindings, you need to link them in your
> implementation. If the primary binding cache entry (I consider the one
> for the IPv6 home address as the primary one) is removed, the IPv4 home
> address binding cache entry should also be removed.

If the draft has recommendation for seperate binding entries,
it would be good have the required identifier present and
avoid this special links between bindings. Changing that MAY
to MUST is better, saving those 4 bytes is not worth the special
linking logic. Why recommend seperate BCE's and why expect this
special linkage, if you consider all of them as one, just bundle
them in one.


> Currently we don't support a scenario where the mobile node can delete
> the binding cache entry for the IPv6 home address, but keep the one for
> the IPv4 home address.

I thought selective dereg is possible. I'm not sure if the MN is
mandated to include HoA option(s) for all the currently obtained
IPv4 addresses/prefixes and if the HA is forced to return them
in dereg. Either way, bit more explicit language in 5.5 will help.



Sri

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