(usagi-users 00658) Re: new suggestion for mobile node implementation

[itojun@xxxxxxxxxx]

>  This is Takamiya, a core member of USAGI.
>  We are thinking about introducing new virtual device for Mobile
>  Node in Mobile IPv6.

	Bump-in-the wire mobile-ip6 implementation?  there are multiple
	problem with it.  I don't recommend this approach.
	1. how many types of L2 can you support with this approach?
	2. MTU issues.  TCP segment size computation should consider
	   mobile-ip6 extension headers, and with bump-in-the-wire
	   approach this is not possible.
	3. scope zones.  If you have a MIPv6 virtual device, the scope zone
	   gets different from the other interfaces.  If you throw a packet
	   to ff02::1%mip6, what will happen?
	4. You also need to duplicate L3 fragmentation code, into mip6 virtual
	   device code, as well as IPv6 output logic.

itojun