[c-nsp] Layer Two tunneling question (advice needed)

[Gert Doering]

Hi,

On Mon, Jan 03, 2011 at 05:23:27PM -0700, John Neiberger wrote:
> DeviceA ------ [6500] -------(fiber run to different site)--------
> [6500] ------- DeviceB

With 6500s, you have two options:

 - make the "fiber run" a trunk, having the existing routed link as
   "just one vlan" on the trunk, add the legacy-device VLAN as switched
   vlan onto the trunk

 - run EoMPLS  (ethernet briding over MPLS)
   requirements: 
     - Sup32 or Sup720 (PFC3B or PFC3C) [simplified]
     - advanced IP services
     - larger-than-1500 MTU on the routed interconnect (mpls mtu 1526 
       or 1530 minimum)
                 
L2TPv3 is not supported on the 6500, you'd need another pair of devices
to provide that.  EoMPLS is pretty painless as soon as you have the 
basic MPLS setup in place, and the MPLS requirements are basic enough
that you can do that with fairly limited impact (just make sure that you
don't all of a sudden label all your traffic -> filter label advertisement)

gert
-- 
USENET is *not* the non-clickable part of WWW!
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de
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