The MPLS WG Archive

["Erickson Trejo-Reyes" <eenet@electeng.leeds.ac.uk>]

Can somebody tell me please how much overhead is introduced by RTP on top of UDP. It is impossible for me, at least for now, to have access to updated ITU-T recommendations. Thanks in advance,

 

 

Erickson Trejo

 

-----Original Message-----
From: David Charlap <david.charlap@marconi.com>
To: mpls@UU.NET <mpls@UU.NET>
Date: Wednesday, August 23, 2000 7:15 PM
Subject: Re: L3PID

 

Hong 
Liao wrote:
> 
> I have questions for the L3PID.
> 
> It 
is an identifier of the layer 3 protocol using this path, it might
> not 
be the IP protocol only, right?

Correct.  According to section 
draft-ietf-mpls-rsvp-lsp-tunnel-06.txt,
in section 4.2.1, 4.2.2 and 4.2.3, it 
says:

L3PID

   an identifier of the layer 3 protocol 
using this path.
   Standard Ethertype values are used.

So, 
any value that is valid as a an Ethernet L3PID is valid here as
well.  
If you want to forward non-IP data through an MPLS tunnel, you
may do so - 
just provide the appropriate Ethertype ID in your label
request 
object.

> As I know, if it is IP protocol using this path, the L3PID 
is 0x0800.

-- David