Re: 4rd-U informal meeting - Tuesday 15:15 Room 204

> On 03/28/12 09:22, Tetsuya Murakami wrote:
>> In terms of CNP, CNP needs to be calculated every time if the packet
>> is toward to outside of domain because the embedded IPv4 address
>> could be different. So, I think there is no difference between CNP
>> and recalculation of L4 checksum from the implementation point of
>> view.
>
> On the contrary, there is a big difference. The difference is that you are only concerned with L3. L4 can change: UDP, TCP, ICMP, STCP, DCCP, etc, etc, etc. You need a lot of code to handle all existing transport protocols, and you still can't handle future protocols that people might develop.
>
> Checksum neutrality is a *big* advantage.