The MPLS WG Archive

[Vasanthi Thirumalai <vasanthi@tellium.com>]

Based on a private mail that I received in response to this mail, a little
more explanantion is in order.

LDP and RSVP-TE are two MPLS control-plane protocols. LDP 'Hello' messages
are exchanged over the UDP port 646. LDP session messages are exchanged
over the TCP port 646.
RSVP-TE runs over raw IP and its protocol number is 46( same as defined in
RFC 2205 )

-Vasanthi
Vasanthi Thirumalai wrote:

> Aditya,
>
> Aditya Bhatnagar wrote:
>
> > MPLS resides at Layer 2.  Why would there be a port number?
>
>     MPLS control plane resides in layer 3 and that is why a port number
> had to be assigned to handle the control plane traffic.
>
> -Vasanthi
>
> >
> >
> > Aditya
> >
> > Samantha Quadros wrote:
> >
> > > Hi
> > >
> > > Has a port number been permanantly for MPLS?
> > >
> > > Samantha