EOS: L2 GRE Tunnel for several VLAN between 2 DataCenters

[M_Nees]

we have the following szenario:
2 physically separated DataCenters.They are connected through L3 routing. in every datacenter we have one S4 VSB Chassis pair. They contain several vlans for servers. most of the servers are virtual (vmware) - but not all - the servers need both the same L2 vlan (same ip addresses) because of redundancy.

How can i setup one (or maybe several) L2 GRE Tunnels between this 2x VSB S4 chassis to connect the server vlans ? How can i get traffic of more than one vlan into the GRE tunnel ? tbp Interfaces ? Or do i need several tunnels ?

What are the current limits / experience / things to keep in mind with recent EOS (8.42)?

The EOS manual is very very poor regarding these szenario. I am looking for an config example and / or a best practise guide.

[M_Nees]

vxlan is one option. But i think that L2 GRE Tunnel is much easier to configure (if someone knows how) and there is no special license needed.

Does anyone able to deal with a config example ?

Regards

[André_Herkenrat]

This is exactly what VXLAN is made for. It is supported with S and K Series and the Release you are using. You need a tunnel license.