[c-nsp] VPLS hub & spoke assistance

[Arie Vayner (avayner)]

Jose,

On the hub device you would have a VFI instance.
The spokes would be configured just as if they were running a point to point xconnect (i.e. xconnect statement on the service-instace)

On the hub, under the VFI, you need to configure your pseudowires as "neighbors" - this is where you would put the no-split-horizon statements for the spokes:

l2 vfi aaa manual
 vpn id 1
 neighbor 1.1.1.1 encapsulation mpls no-split-horizon
 neighbor 2.2.2.2 encapsulation mpls no-split-horizon


HTH
Arie

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Lobo
Sent: Friday, October 31, 2014 11:44
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] VPLS hub & spoke assistance

Hi everyone.  I'm trying to understand vpls with a hub & spoke topology a little better but I'm having a hard time grasping which site(s) need to have the no split-horizon configuration added to them.  Not sure if this is even possible with the autodiscovery option vs using manual.

So right now I've got four sites setup in a full mesh with the following configuration on each PE router (ME3600X):

l2 vfi TEST1 autodiscovery
  vpn id 3000
!
interface GigabitEthernet0/4
  service instance 3000 ethernet
   encapsulation dot1q 3000
   rewrite ingress tag pop 1 symmetric
   bridge-domain 3000
  !
!
interface Vlan3000
  no ip address
  xconnect vfi TEST1
!

So if I want sites 2, 3 and 4 to not be able to talk to each other except by going via site 1 what configuration change would I need to do?  I thought that adding "split horizon" to the bridge-domain under the service instance was the way to go but I'm not so sure.

Ideally, I'd like a scenario where I can have one site as the hub and be able to take advantage of the autodiscovery for instances when a new spoke is added to the domain.  Granted only the hub is benefiting from this auto discovery but does that mean that the spokes should be configured as "manual"?

Thanks for any suggestions.

Jose

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