Re: [Softwires] Proposed Unified Address Mapping for encapsulation and double-translation

[Tetsuya Murakami <[e-mail]>]

On 2011/10/10, at 1:58, Ole Troan wrote:

>>> The 4rd function examines ALL packets that reach the CE.
>>> It processes all those that have V in their destination addresses, and only those.
>>> 
>> This is a big change to the current forwarding behavior of CPE devices, doable, but quite different from, for example, some encapsulation/decapsulation implementations.
> 
> +1.
> doable in theory, but I share your concerns.

+1.

From a developer point of view, I think there is a big impact on the current forwarding behavior on every major operating systems. In fact, I have never seen a similar implementation of any encapsulation/decapsulation so far.

Normally, the decapsulation could be done for the packet having the tunnel end-point address as the destination or having the specific IPv6 prefix as the destination. There is a big impact on the current implementation to look into a specific value in the last 64bit of IPv6 destination address. From the developer point of view, I would like to utilize the existing implementation as much as possible.

Thanks,
Tetsuya Murakami