The MPLS WG Archive

[Erblichs <erblichs@earthlink.net>]

This is abit of simplification, but should suffice..

IPv6 is the next generation protocol of IPv4 to move beyond
32 bit addressing.

IPv4 and IPv6 are end-system(ES), intermediate-system(IS), intermediate
system, end sytem protocols that are destination based protocols.
Note: ES is aka a host and IS is aka to a router.

MPLS is a IS-IS protocol that is source based, based on labels
being used for routing when entering a MPLS domain by a edge
router and only being removed when exiting the MPLS domain
at the exiting MPLS edge router.

At the entering MPLS edge router, the same mechanisms apply
as a VLAN tagged frame, to translate to the correct MPLS label
based on a number of factors, one of them could be the incoming
port.

Thus, MPLS requres IPv4 and/or IPv6 to be properly routed, but
IPv4/IPv6 does not need MPLS.

Hopefully this helps...

Mitchell Erblich
---------------------------



Piotr Marecki wrote:
> 
> Halo ,
> 
> IPv6 is related to MPLS in the same way as IPv4 ( i.e it is another network
> protocol transported on top of MPLS ). In that sense IPv6 is
> used with MPLS but not instead of. Please note that the IPv6 flow label has
> dissimiliar meaning than MPLS label and shall be used to diffrentiatate
> flows along with source and destination address ( see RFC3697 ) .
> 
> regards
> 
> Piotr Marecki
> 
> ----- Original Message -----
> From: "Jung Janos" <jj306@hszk.bme.hu>
> To: <mpls@ietf.org>
> Sent: Tuesday, September 28, 2004 11:22 AM
> Subject: [mpls] mpls vs IPv6
> 
> > Hi!
> >
> > I have to make some performance mesurement, with
> > IPv6, IPv4, mpls, but first i must find out,
> > if it has a sense.
> >
> > With MPLS I can create MPLS VPNs, QoS can (really?) be
> > granted to packet flows, and routing is more faster.
> >
> > IPv6 has the "Flow label" field wich makes routing faster
> > and has less header overhead than ipv4 (or mpls+ipv4)
> > And i think flow label could have the same use as
> > the mpls label value...
> >
> > How is MPLS to IPv6 related?
> >
> > Are they technologies that have nothing to do with each other?
> >
> > Or MPLS can bring new functionalities to IPv6 networks (like to IPv4), and
> > so mpls+ipv6 would have a sense?
> > And if so, what are the benefits?
> >
> > Or:
> >
> > IPv6 has all what mpls+ipv4 has (separeted flows to support qos
> > VPNs faster routing) and so mpls would have no further use?
> >
> > In the new IPV6 era what role will mpls play?
> >
> > thanks for the answers!
> > and sorry for the bad english
> >
> > regards
> > JJ.
> > (student)
> >
> >
> > _______________________________________________
> > mpls mailing list
> > mpls@lists.ietf.org
> > https://www1.ietf.org/mailman/listinfo/mpls
> >
> 
> _______________________________________________
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> mpls@lists.ietf.org
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