I can not solve this problem.
There modem / router (192.168.1.1) with wifi which distributes online. There wifi and router with dd-wrt, which must also distribute the Internet, but in the subnet 192.168.2.1.
How to configure a router with dd-wrt, that it was possible to connect by cable to the lan port of the first router (192.168.1.1) and when connected to the router on which the dd-wrt on lan or wifi, the device receives from the network ip 192.168.2.X and have access to the internet?