[spring] Re: [IPv6]Re: C-SIDs and Upper-Layer Checksums (draft-ietf-spring-srv6-srh-compression)

[Robert Raszuk <[e-mail]>]

Tom,

For starter let's take a look at RFC1958 ..

Entire document is pretty good including statements like this:

*The basic argument is that, as a first principle, certain required
end-to-end functions can only be performed correctly by the end-systems
themselves.*

Thx,
R.


On Thu, Jun 13, 2024 at 6:54 PM Tom Herbert <[e-mail]> wrote:

> On Thu, Jun 13, 2024 at 9:28 AM Robert Raszuk <[e-mail]> wrote:
> >
> > All,
> >
> > As far as I recall during IPv6 discussions a notion of end-to-end
> principle of Internet design was treated as paramount. Number of decisions
> made in shaping IPv6 encoding were derived from this.
> >
> > One of those is checksum which has been removed from the IP header and
> shifted to higher layers (TCP or UDP or UDP-light etc ...).
> >
> > That means that no transit node (ie the node which is not the ultimate
> destination of the transport and above layers) have the right to validate
> any IPv6 checksum. If it is being done that is a spec violation and they
> should do it at their own risk.
>
> Robert,
>
> Please cite the RFC that expressly forbids an intermediate node from
> validating the transport layer checksum for operational or debugging
> purposes
>
> Tom
>
> >
> > So with that "the time has come to say" that this discussion which aims
> to simply block the subject draft which many customers do use today for
> various real network applications should just end.
> >
> > Regards,
> > Robert
> >
>