Can I configure L2TPv3 between two 2851 Routers, when the Vlan I want to pass (Vlan 22) from site to site is configured on HWIC 4 port FastEthernet on one Router and a 23 Port FastEthernet on the second Router?
The two sites are connected between then via IP over Ethernet (FastEthernet 0/1 on each Router).
My problen is the switch modules on each side.
If you have access-vlan 18 on both F0/3 and F0/23, you aren't sending a dot1q vlan header, the frame is untagged.
The only way to send dot1q vlan headers is to configure dot1q trunking on both F0/3 and F0/23.
Both routers in the L2TPv3 configuration will forward these frames but you need to make sure both end devices (the laptops on this case) support dot1q.