[c-nsp] LAC in IP and LNS in MPLS network

[Swaroop Potdar]

Well, this reply below sums up perfectly my previous two replies.
Having said that, the whole thing could be designed in a much simpler
way if you give the complete picture.
 
Only reason I feel is your sister concern wants to use LAC service in a region
where they dont have presense, and that through your infrastructure.
 
And also next question is they are using your LAC for your own VPN 
or their other customers.
 
More information regaridng the same is desired.
 
HTH-Cheers,
Swaroop
 

	-----Original Message----- 
	From: Oliver Boehmer (oboehmer) [mailto:oboehmer at cisco.com] 
	Sent: Wed 10/4/2006 6:23 PM 
	To: Swaroop Potdar; Vikas Sharma; cisco-nsp at puck.nether.net 
	Cc: 
	Subject: RE: [c-nsp] LAC in IP and LNS in MPLS network
	
	

	Well, I would put it as simple as this: As long as you have IP
	connectivity between the LAC in your network and the LNS in the other
	network, you can establish an L2TP tunnel. Your sister company needs to
	evaluate how to establish this connectivity (below is one option to do
	this if the LNS is indeed reachable in the global routing table of the
	MPLS network), and they also need to evaluate what to do with your
	sessions..
	
	Can you explain what you're trying to do in a broader sense? Provide
	access for your dialin users, I reckon, but access to what? Your own VPN
	within the MPLS domain? Other VPNs?
	
	        oli
	
	Swaroop Potdar <mailto:Swaroop.Potdar at Corliant.com> wrote on Wednesday,
	October 04, 2006 2:43 PM:
	
	> Hmm...this changes the thing a little, and if we had this explanation
	> before we could have saved some bandwidth. :-)
	>
	> Ok now this can be achieved by doing a route leak between the Global
	> and VRF table. Although such a thing is not recommend for vast
	> implementation, but can be surely
	> adopted as both are your domains, and its a fixup solution
	> for your organization only.
	>
	> For the route leak part you will need to add two static routes.
	> 1) VRF static route for your VRF pointing to the LNS IP address.
	> 2) For reverse route normal IPV4 route pointing back to the PE-CE
	>    link where your CE is connected, and the same advertised
	> in your global table.
	>
	> HTH-Cheers,
	> Swaroop
	>
	>
	>
	>
	>
	>
	>       -----Original Message-----
	>       From: Vikas Sharma [mailto:vikassharmas at gmail.com]      Sent:
	Wed
	>       10/4/2006 5:44 PM To: Swaroop Potdar; cisco-nsp at puck.nether.net;
	> Oliver
	> Boehmer (oboehmer)
	>       Cc:
	>       Subject: Re: [c-nsp] LAC in IP and LNS in MPLS network
	>
	>
	>       Hi,
	>
	>       Situation is a bit different. LAC is in my network
	> which is IP network. Our sister concern has MPLS network
	> which is totally different then our network. When I moveout
	> from my end router (this will be CE for other network), i go
	> in to MPLS enable network and LNS is there inside the MPLS network.
	>       So first My router will act as a CE router
	>       Provider router acts as a PE router
	>       LNS s inside the provider MPLS network.
	>
	>       in this case how i can establish L2TP tunnel?
	>
	>       Regards
	>
	>
	>
	>       On 10/4/06, Swaroop Potdar <Swaroop.Potdar at corliant.com> wrote:
	>
	>               Yes till you have plain IP reachbility till
	> your LNS it will work.
	>               As the LAC only requires IP reachbility for
	> L2TP creation.
	>
	>               The VRF is imposed at the LNS. So only your LNS
	> needs to run MPLS.
	>               And the connection till your customer is on
	> plain layer 2 using L2TP and PPP
	>
	>               HTH-Cheers,
	>               Swaroop
	>
	>                                               -----Original
	> Message-----
	>                       From: Vikas Sharma
	> [mailto:vikassharmas at gmail.com ]
	>                       Sent: Wed 10/4/2006 4:02 PM
	>                       To: cisco-nsp at puck.nether.net
	>                       Cc:
	>                       Subject: [c-nsp] LAC in IP and LNS in
	> MPLS network
	>
	>
	>
	>                                               Hi,
	>
	>                       Can I configure L2TP tunnel where my
	> LAC is in IPv4 network and LNS in MPLS
	>                       network.
	>                       Call flow - Laptop dial -> LAC -> LAC
	> AAA authentication -> LAC will confirm
	>                       the tunnel end point (i.e. IP of LNS)
	>
	>                       Regards
	>                       Vikas Sharma
	>
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