Tony Hain wrote:
>
> Alex Conta wrote:
>
> > The bits in the field are mutable, they are "read/write".
> ...
> > The meaning of the Diffserv flow label bits is immutable.
>
> This makes no sense... Those are the same bits, so they have
> to be one or the other. Since you are promoting a diffserv
> usage, I have to assume you intend them to be immutable
> end-to-end with a well known semantic, but you keep insisting
> they are mutable. As long as the TC field is mutable, there
> has to be another one that is visible and immutable.
>
> Tony
>
Let's take an example.
Let's say flow label value 50, is RT traffic between A and B.
C, D, and E are routers between A, and B. Between A, and C, the RT
traffic to B, has flow
label 50. At router C, the value of 50 changes to 60, and it stays that
way, to E, where it is changed back from 60 to 50.
Between C and E, the meaning was the same, as between A, and C, and E,
and B, that is
the RT traffic between A and B.
The flow label bits were mutable, the meaning was immutable.
Alex
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