[j-nsp] VPLS Multihoming on Junos - FEC confusion

[Krasimir Avramski]

Hello,

IMHO there is mess with docs/terms. FEC 128 multihoming as described has
nothing to do with ldp. It's bgp signaling and autodiscovery.

Krasi


On 8 September 2013 22:37, Darren O'Connor <darrenoc at outlook.com> wrote:

>
>
>
> Hi list.
>
> I'm going over the VPLS multihoming options on Juniper's web site. I'm not
> concerned with LAG and MC-LAG for the moment.
>
> As far as I'm aware, FEC128 is when you are using manual discovery of
> pseudowires (LDP) - FEC129 is when you are using BGP auto-discovery.
>
> Juniper techpub for FEC129 multihoming I don't have a problem with as it
> shows how to multihome with BGP:
> https://www.juniper.net/techpubs/en_US/junos/topics/topic-map/vpls-bgp-multihoming.html
>
> The FEC128 multihome techpub says that you cannot enable LDP signalling,
> you have to use BGP signalling:
> http://www.juniper.net/techpubs/en_US/junos/topics/usage-guidelines/vpns-configuring-vpls-multihoming.html
>
>
> I know that you can use LDP for manual discovery and LDP will then signal
> VC labels. You can also use BGP for auto-discovery and LDP for VC label
> signalling. You can also use BGP for both.
>
> What I don't get is how you could use FEC128 with BGP signalling. Junos
> doesn't give you the option to only signal through BGP but manual discovery
> through LDP.
>
> So my question is, when exactly would the FEC128 config be used over the
> FEC129 config? If you are using BGP for signalling are you not using BGP
> for discovery at the same time?
>
> Or maybe I'm just misunderstanding something.
>
>
> Thanks
> Darren
> http://www.mellowd.co.uk/ccie
>
>
>
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp
>