I have a wireless MT based network. All customers connect via PPPoE and get public IP addresses with the MT doing the PPPoE ( I plan on going to Radius soon). I am looking to solve 2 problems and I think the solutions will be closely related. I unfortunately am just not enough of an expert to flesh them out.

1. I have a customer that wants to connect remote offices back to his main office and use his own bandwidth and DHCP server to handle his remote lans. What would be the best way to solve this using my current network as his transport between sites. He would not be able to access my bandwidth connection. I assume some sort of VLAN would be the ticket - but am unsure of how to implement it.

2. I want to build a LAN between 3 locations - 2 connected via my wireless network, and the other is our office. What is the easiest way to go about that? Since the bandwidth terminates at the office - I assume that is where the LAN would go to access the world. VLAN's again? What would some of you experts do?

when you say 'bandwidth' do you mean public internet access ?

That is exactly what I mean - my pipe back to the net.

Any hints????

1. Put down a small RB133 based router at your client's remote office. (Or load openvpn client on pc /server there)
2. Make an openvpn connection from your client's mikrotik based cpe and use bridged mode.

This should make your client's machine able to use the dhcp-server and gateway on his remote network.

This is however not so good ass multicast traffic will also be bridged trough the "low-bandwidth" connection.
Some firewalling might help you here.