Re: [mpls-linux-general] Ethernet over MPLS vs PWe3-rfc3985 and drafts

[James R. L. <jl...@mi...>]

Currently ethernet over MPLS forwarding is broken.  But it will not
take much to fix.

I have another project which aims to provide a generic layer 2 cross connect
framework for the linux kernel.  The project hasn't received much attention
because I've been busy working on mpls-linux.  The last patch from the l2cc
project provided a mechanism to specify any frame interface (ethernet, VLAN,
PPP, GRE) and redirect frames arriving at the interface to another interface
or on to a LSP.  The implementation is very straight forward and easy to ex=
tend.
My guess is that you would not have too much difficulty applying that patch
to a recent 2.6 kernel.

One thing to note is that the recent 'tc action' work in the 2.6.11 and
2.6.12 kernel might provide a better infrastructure to do the same thing
as my l2cc patch.  You would have to add some new 'actions', but that should
be fairly straight forward.

As far as the signaling side, there does not exist a working implementation.
I have added the encode and decode functions for martini style signaling
(via LDP) but none of the internals have been implemented.  I have the begi=
nning
of a l2-circuit configuration and infrastructure for quagga, but it is not
complete.

So the long and the short of it is that there is plenty of room for
improvement in this area.  Let me know where you want to start and I will
be happy to point you in the right direction and answer questions.

On Wed, Jun 22, 2005 at 08:23:55PM -0300, die...@ad... wrot=
e:
> We are working in a telecommunication degree project and we aims to devel=
op
> some additional feature to the patch.
> The last couple of month we were studying Linux kernel networking stack i=
mplementation
> for kernel 2.6 and the MPLS code itself.
> At this point we decided to add some features to the Ethernet over MPLS s=
upport
> so we need some clarification in this regards:
>=20
> 1)What is the meaning of the current ?Ethernet over MPLS support? in the
> patch? Is it the tunnels implementation, and the meaning of the tunnels a=
re
> that an Ethernet frame will pass through an MPLS network in a transparent
> basis (just like in L2 switching )?
> 2)Is there some implementation of PWe3-RFC3985 included in the patch and/=
or
> VPLS? If not, will it be something interesting to add as a feature in the
> current implementation?
> 3) Someone else is working on that?
>=20
> Thanks,=20
> =20
> Diego G.
>=20
>=20
>=20
>=20
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--=20
James R. Leu
jl...@mi...