While this creates signaling overhead, the real detriment to large scale deployment is the packet replication requirements for each provisioned pseudowires on a PE router. Hierarchical connectivity, described in this document, reduces signaling and replication overhead to allow large-scale deployment.
PE-rs, which is one of the main motivations for using H-VPLS, is not an exclusive capability of LDP-based H-VPLS. Routers may have this capability regardless of the signaling protocol that is being used. This is indeed possible with Juniper Networks MTU-s...
LSPs, either based on LDP or RSVP-TE (each one with its advantages). So why not go to the origin of the problem and solve it? This is what Juniper has been proposing by integrating the use of point-to-multipoint LSPs with VPLS in such a way that broadcast, multicast, and unknown unicast will be forwarded using point-to-multipoint LSP, which will only be replicated on the network where the network really requires it.
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