Like someone else said, l2circuit is a Martini-style pw where you need to specify the remote end of the pw as a targeted ldp session "protocols l2circuit". There is no dynamic control protocol for the setup/teardown of those sessions. l2vpn is the Kompella-style which uses MP-BGP as the control protocol for the setup of those sessions.

There is no direct replacement for L2TPv3 pw on the Juniper platform, since it doesn't support L2TPv3; it must run over MPLS. You can do MPLS over a GRE tunnel if you want to go over an IP network in the middle.

Phil


On Jan 8, 2009, at 12:50 PM, Andrew Jimmy wrote:

What are the major differences between l2cirucit and l2vpn in terms of
Juniper JUNOS. Which is best in replacing Cisco L2TPv3 pseudo-wr.

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