[EMAIL PROTECTED] wrote:
>
> >It still isn't clear to me what the flow label adds to the semantics
> >used by existing 5-tuple QOS classifiers.
>
> just checking, here by "5-tuple" you meant:
> - IP address pair (src/dst)
> - layer 4 port number pair (src/dst)
> - protocol type
> is it correct?
Correct. And that will be used by classifiers in both IntServ and DiffServ
implementations.
>
> except for IP address, they may be embedded into ESP, or may be buried
> in IP header chain. so for efficient router operation we need to
> use flow label, which will effectively give us the following 3 items
> (depending on the definition of "flow"):
> - layer 4 port number pair
> - protocol type
Only if we define a standard way of compressing the ports and protocol type
into the flow label.
> see RFC2205 page 9.
> i believe this (availability of flow label field) is one of important
> value-adds of IPv6 against IPv4.
"Could be", not "is", unfortunately. It's very dangerous to use this as a sales
argument before it is actually true.
Brian
--------------------------------------------------------------------
IETF IPng Working Group Mailing List
IPng Home Page: http://playground.sun.com/ipng
FTP archive: ftp://playground.sun.com/pub/ipng
Direct all administrative requests to [EMAIL PROTECTED]
--------------------------------------------------------------------
