Re: [Fwd: I-D ACTION:draft-lear-multi6-things-to-think-about-00.txt]

[Erik Nordmark <Erik.Nordmark@eng.sun.com>]

>With any multihoming solution that allows rewriting of addresses 
>between the moment the checksum calculation is done and the moment the 
>packet is transmitted/received, checksum offloading will pretty much 
>have to be a thing of the past, unless we want to start doing some 
>complex incremental updating in different places.

I think whether checksum offloading is affected or not is a function of 
exactly how checksum offloading is implemented.

I know one vendors implementation of checksum offload that wouldn't have
a problem - because software is capable of compensating for differences
between the IP addresses in the IP header and in the TCP pseudo-header
in order to properly handling routing headers.

I don't know to what extent the same flexibility exist for other vendors.

  Erik