---------- Forwarded message ----------
From: "Mark Lewis" <mark@mjlnet.com>
To: KWygand@customonline.com
Date: Thu, 12 Jan 2006 09:34:04 +0000
Subject: Fwd: RE: Running Layer-2 across Layer-3
Hi,

I think someone may have already mentioned that one possibility is L2TPv3. Here's a sample config (assuming that your routers will support L2TPv3)- it's pretty simple:

!
! On R1
!
l2tp-class Class.To.R3
 digest secret cisco hash sha
!
pseudowire-class PW.To.R3
 encapsulation l2tpv3
 protocol l2tpv3 Class.To.R3
 ip local interface Loopback0
!
interface Ethernet0
 xconnect <loopback ip on R3> 1001 pw-class PW.To.R3
!



!
! On R3
!
l2tp-class Class.To.R1
 digest secret cisco hash sha
!
pseudowire-class PW.To.R1
 encapsulation l2tpv3
 protocol l2tpv3 Class.To.R1
 ip local interface Loopback0
!
!
interface Ethernet1
 xconnect <loopback ip on R1> 1001 pw-class PW.To.R1
!


If you really wanted to (and your routers supported it), you could even deploy an AToM pseudowire over a GRE tunnel (I am assuming that MPLS is not running between R1 and R3)!! But something like L2TPv3 is probably your best bet.

HTH,

Mark

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