Re: VPLS Split Horizon Doubt

Hi Adam,

Mesh Gorup is what u call as in One bridge DOmain, there are more than 1
pseudowire.
In one particular bridge domain there are 5 pseudowires, that is called as
MESH GROUP ..
Am i getting it right ?

On Wed, Dec 7, 2011 at 3:13 PM, Adam Booth <adam.booth_at_gmail.com> wrote:

> Are you trying to understand why it is when a BUM (broadcast,
> unknown-unicast and multicast) frame is received on a pseudowire that is in
> a mesh-group, it will not send the frame out to other mesh-group members?
> Primarily this is to help contain replication through the VPLS, otherwise
> you would achieve a nice self induced denial of service attack.
>
> The split horizon rule for BUM frames in VPLS just means you treat all the
> psuedowire of the mesh-group as if they are a single big psuedowire. The
> mesh group is configured as a full mesh, so if something came in from a
> mesh-group psuedowire, all the other nodes that are part of the mesh-group
> would have recieved that frame too.
>
> The two types of pseudowires in a VPLS that I'm aware of are spoke (just
> your regular point-to-point) and mesh. You can combine these in interesting
> ways to build a hierarchical VPLS (H-VPLS) which means you can have large
> topologies but not have a N squared problem when it comes to putting
> together the psuedowires to build it.
>
> Cheers,
> Adam
>
> On Wed, Dec 7, 2011 at 4:30 PM, Routing Freak <routingfreak_at_gmail.com>wrote:
>
>> Hi all,
>>
>> I have a doubt in VPLS Split Horizon rule. My understanding is " Whenever
>> a
>> frame received from a psuedowire , that particular frame should not be
>> sent
>> o anohter Psuedowire . So inside the same Bridging domain,t here can be
>> many psuedowires, so how could a loop form when there are mulitple
>> pseudowires inside the same bridged domain?. So how many types of
>> pseudowires are present in VPLS?
>>
>> Please correct me if i am wrong.
>>
>>
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Received on Wed Dec 07 2011 - 16:18:31 ART