RE: vpls

Yeah, I believe that you would manually disable it on all pseudowires on
the hub. Not sure about the exact commands offhand.

You may also look into Hierarchical VPLS, which is a hybrid between full
mesh and hub and spoke. Basically you have tiers of PEs - N-PEs have a
full mesh of pseudowires between each other with split horizon enabled,
and U-PEs have a single pseudowire that connects to an N-PE. At this tier
split horizon disabled. CE routers actually connect to U-PEs.

Ronnie
On Mar 19, 2012 8:41 PM, "Aaron" <aaron1_at_gvtc.com> wrote:

> Thanks Ronnie. I appreciate the input. Do you mean I should disable
> split horizon on the pws coming in on the *hub* vpls vfi location in
> order to allow pw to pw switching? I mean will I have to do that
> manually? Like somehow disable split horizon per pw? if so lemme know
> commands if you know them.****
>
> ** **
>
> Is it something like.?****
>
> ** **
>
> Conf****
>
> L2vpn****
>
> BG.
> BD.
> (ac here)****
>
> Vfi
> neighbor 1.1.1.1 123
> (disable SH somewhere in here?)****
>
> ** **
>
> ** **
>
> Also, if I wanted a dual hub spoke architecture, it would seem that I
> would have each spoke site dual homed to those dual hubs I mentioned, and
> then those dual pws coming into a single spoke site would simply NOT
> forward between those pws by default. with a single connection between
> the dual hubs (with SH disabled on that hub to hub connection).does that
> seem do-able to you?****
>
> ** **
>
> (I actually need to set this up tomorrow..I have (15) asr9ks and about
> (10) asr901s that I need to get up and running over this vpls architecture
> Im discussing with you.this is the inband (quasi oob mgmt) architecture
> that Im talking about doing vpls with)****
>
> ** **
>
> Thanks****
>
> Aaron****
>
> ** **
>
> ** **
>
> *From:* Ronnie Angello [mailto:ronnie.angello_at_gmail.com]
> *Sent:* Monday, March 19, 2012 7:27 PM
> *To:* Aaron
> *Cc:* Cisco certification
> *Subject:* Re: vpls****
>
> ** **
>
> Full mesh is the most commonly deployed architecture, but you can also
> have a hub and spoke or partial mesh topology. Split horizon isn't enabled
> in these cases. It's disabled on the hub in a hub and spoke topology as
> it's loop free by definition. You must run STP over the backbone with a
> partial mesh.****
>
> Ronnie****
>
> On Mar 19, 2012 10:01 AM, "Aaron" <aaron1_at_gvtc.com> wrote:****
>
> As I understand it, pw's attached to a vpls group (I think known as a vfi)
> within an ASR9K (or perhaps any vpls capable device) have a slit horizon
> rule that disallows pw---to---pw switching (by default); something about
> loop prevention. and thus because of this requires a full pw mesh between
> vpls nodes. Is there a way around this or is that a hard fast rule? (ibgp
> requires full mesh, but there's a way around it with rr's)
>
>
>
> Aaron
>
>
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Received on Mon Mar 19 2012 - 21:03:23 ART