[j-nsp] Vpls-ldp signaling

[Junos Guy]

Thanks Steinar.
That clears it up.

I wonder why Juniper has mentioned Ldp based signaling for Vpls in
7.6Release Notes.
Probably they need to remove it from 7.6 release notes as they don't support
it to avoid unnecessary confusion.




On 3/1/07, sthaug at nethelp.no <sthaug at nethelp.no> wrote:
>
> >   You can read JNCIS book from Sybex on page 650 as below :
> >   " Within the JUNOS software, two main varieties of these VPNs exist.
> To help differentiate
> >   between the different Layer 2 VPNs, we'll use the configuration syntax
> as our guide. The first type of VPN is based on a draft specification by
> Kireeti Kompella. It uses the Border Gateway Protocol (BGP) as the mechanism
> for PE routers to communicate with each other about their customer
> connections. We'll refer to a Kompella-based configuration as a Layer 2 VPN.
> The second main form of a VPN is based on a draft specification by Luca
> Martini and uses the Label Distribution Protocol (LDP) between PE routers.
> Every router establishes a unique connection for each customer using the
> VPN. The Martini-based VPN is known as a Layer 2 Circuit within the
> configuration. "
>
> The two varieties of *point to point* L2 circuits (Martini and Juniper
> proprietary) are not the issue. The issue that started this thread was
> somebody asking about LDP for *VPLS* (point to multipoint) signaling.
> And a later reply which evidently misunderstood the question to be
> about point to point L2 circuits.
>
> So, all together now:
>
> - Juniper currently only supports BGP for VPLS (L2 point to multipoint)
> signaling.
> - Juniper supports both standard Martini tunnels (l2circuit in Juniper
> speak) and proprietary BGP based signaling for L2 point to point.
> Martini tunnels are interoperable with Cisco and other vendors.
>
> All clear now?
>
> Steinar Haug, Nethelp consulting, sthaug at nethelp.no
>
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