L2TPv3 vs. L2TPv3-ether?

RouterOS General
1
  1. I am studying ways to create a L2-bridge between two location where I want to transmit full Ethernet frames (at least 1500 MTU) with IPv6-internet as transport mechanism, and pure IPv6 inside the tunnel. I was hoping someone could share some clarification on the difference on what the documentation reefers to as l2tp-ether contra l2tpv3?

I am able to set up a basic L2TPv3 connection through the server and client settings, and it works with IPv6 between them. Is l2tp-ether more of a point-to-point connection? I cannot see a way to specify username/password, etc....

  1. And if anyone has any idea on what kind of performance one can hope for in such a setup? (between 0% and 50 % that should be a theoretical maximum since there will be two packages per tunneled package. We would prefer zero-encryption on the link, and use all CPU for tunneling and package fragmentation and de-fragmentation. If both locations have a gigabit connection, 500 mbit should be the absolute maximum.

  2. I assume a L2-bridge via OpenVPN also can do the trick, it can also be configured with encryption disabled, so if anyone have any ideas about OpenVPN over IPv6 (transport) and how package fragmentation is handled or not, please share.

2

The Mikrotik-proprietary EoIP-protocol might be an option as well, if it can do packet fragmentation over an IPv6-transport network, since all involved routers are Mikrotik based.

3

You can lower the MTU and it will fragment traffic, unless you set the dont-fragment option.

Also, L2TP may not needed if you go down the EoIP method, since EoIP has an option to enable IPSec automatically (using PSK).