L2VPN vs GRE tunnel VPN

[rajesharihant]

Experts, 

I am aware of GRE tunnel VPN, I configured two routers with tunnel. 

2 different subnets(VLANs) at two different locations, are able to communicate with this GRE tunnel mechanism. Thats good indeed. 

However, I am looking for a solution where the same subnet/prefix/vlan is extended over two sites/routers - (Like a switch). 

I am not sure, but I heard L2VPN may help - but I searched online but couldn't get clear picture of it. is it true? May someone please simply explanation on this - that would be of real help. 

Please also, see the GRE VPN tunnel that I made for 2 VLANs, which works just fine. 

Regards,

Raj

[rais]

GRE based solution shown is a layer-3 solution. For end to end pseudowire / L2VPN you need to enable MPLS on the two routers with LDP signalling.

HTH

[rajesharihant]

Rais, thanks. 

do we need to have to MPLS for L2VPN?

Rajesh. 

[rais]

Mostly term L2VPN refers to mpls based solution. However for point to point ethernet you can use l2tpv3 to get the same functionality.

https://www.cisco.com/c/en/us/support/docs/ip/layer-two-tunnel-protocol-l2tp/116266-configure-l2-00.html

Thanks.

[MHM Cisco World]

L2vpn have two branch,

If the SP is ip core then use l2tp

If the SP is npls core then use vpws.