@wp-fred 

I don't believe GRE is an option.  However, you can run L2TP over IPsec instead.

Hi @wp-fred 

Thanks for posting in our business forum.

Three options for you to pick from.

L2TP over IPsec

IPsec.

Or GRE over IPsec.

I am not sure I understand what you ask for here.

Hi @wp-fred 

Thanks for posting in our business forum.

wp-fred wrote

  @Clive_A 

Thank you for your answer.

I would like to run a VPN server (ER7206 or ER8411) and connect multiple sites based on ER605 via a LAN-to-LAN (transparent layer 2 connection) in order to support multicast (IGMP) protocol. In this setup Device-A and Device-B just gets IP-address from DHCP server over the layer 2 tunnel.

I was hoping firmware supports OpenVPN bridge-mode. But it seems OpenVPN Bridge mode is not supported yet. Are there any alternatives?

For a proof of concept I have bought ER7206 and two ER605 units. Since I have not much experience with TP-link equipment, do you have a HOWTO document?




 

Set up the IPsec then. S2S. You can find the guide on the official website. FAQ.

  @wp-fred 

^^ That is the reason the OP wants to run GRE over the IPSEC.

TPlink routers support an IGMP proxy for WAN ports, but I don't know if that extends to VPN endpoints.