Quote:
Originally Posted by qasdfdsaq
PPPoE makes no sense to me, L2TP does. PPPoE makes sense on ADSL where it's (encapsulated) ethernet to the BRAS. VM doesn't give you an ethernet link to the VPN "server", the ethernet is terminated at the local CMTS, the remainder of the path being over VM's standard IP core.
---------- Post added at 16:53 ---------- Previous post was at 16:49 ----------
I suspect you're wrong and the Superhub creates a direct L2TP tunnel to a remote LAC that VM are using for the static IP endpoint, and the CMTS has nothing to do with it.
This is because a) if it were PPPoE to the CMTS, then there would be no reason for the Superhub to be issued a public routablle DHCP IP on it's cable interface and b) There are both PPP(non-oE) and L2TP up/down messages in the Superhub's local event log.
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The LAC is the start point of the L2TP tunnel, not the end. It isn't the static IP end point, that'd be the LNS, and the LAC in this case is the CMTS.
Part of the reason business services were late getting DOCSIS 3 was because VPDN support, as in being a LAC, was either dodgy or non-existent in the early software.