[c-nsp] MPLS over VLAN

[Paul Stewart]

Can someone explain this a bit better for me? ;)   Sorry if this is "MPLS
101"...

We are getting ready to deploy some equipment (mixture of Cisco/Juniper)
that is MPLS capable.  We'd like to transport some VPLS traffic however in
the middle of a few of the links are layer2 switches - we've been told this
isn't possible even with 1600 MTU frame size supported.... Juniper is
telling us (in one particular segment) that we must hang MX gear in there to
make it work with MPLS... 

Just looking to clarify MPLS type traffic over VLAN layer2 equipment and
works and doesn't work and why.... as you can tell we're fairly new to the
MPLS side of things but hoping to get up to speed soon...

Cheers,

Paul


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Gert Doering
Sent: April-26-10 5:15 PM
To: Jeff Bacon
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] MPLS over VLAN

Hi,

On Mon, Apr 26, 2010 at 06:57:57AM -0500, Jeff Bacon wrote:
> Can you do tag switching over a dot1q trunk via a SVI on a 6500? 
> (Sup720)

Yes.  (Just make sure that your intermediate switches - if any - can handle
bigger MTUs).

We do this all over the place (because it sometimes cannot be avoided to
have router-interconnection VLANs and 'Layer 2 stuff' on the same
link) and it "just works".

gert
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