The MPLS WG Archive

[Anoop Ghanwani <anoop@cosinecom.com>]

Title: RE: label encapsulation for LAN media

Seenu,

The standard for MPLS over Ethernet media is the one specified
in draft-ietf-mpls-label-encaps-07.txt.  The one presented in
draft-srinivasan-mpls-lans-label-00.txt had some issues that
needed to be addressed with regard to  bridge learning.
As such we decided not to pursue it, and the draft has since
expired.

-Anoop

> -----Original Message-----
> From: seenu@samsung.co.kr [mailto:seenu@samsung.co.kr]
> Sent: Monday, August 07, 2000 1:57 AM
> To: chetanpinto@hotmail.com; mpls@UU.NET
> Subject: label encapsulation for LAN media
>
>
> Hi,
>
> I have the following doubts on mpls-ethernet.
>
> Draft-ietf-mpls-label-encaps-07.txt  says that the Label
> Stack (label encapsulation on LAN media) must appear AFTER
> the data link layer headers, but BEFORE any network layer headers.
>
> But the draft-srinivasan-mpls-lans-label-00.txt says that: (ARIS too)
>
>       The main drawback of using the above approach for
> label-encapsulation is that accessing the labels requires
> that the frames be processed by software, reducing the
> benefit offered by label switching. Alternatively, hardware
> technology specific to label switching may be developed.
> However, standardized devices incorporating this technology
> do not exist today and cannot be built until the MPLS
> standard becomes stable.
>
>       And this draft has proposed the use of destination MAC
> address field for label encapsulation.
>
>
> Now, my doubts are:
>
> ? If one follows the first case (label-encaps-07.txt), how
> the label swapping will be done (s/w or h/w)
> ? Is there any ethernet standard (h/w) that supports the
> above type of switching (label-encaps-07.txt).
> ? Which is the standard draft that is being followed.
> ? If any of u have implemented the above, pls help me.
>
>
> Thanks in advance
>
> regards
> seenu
>