After understood that when ePMP act as AP, Wireless interface' IP and Ethernet interface' IP is same, therefore, I have configured this case following:
* AP site
- AP is connected to ADSL router, ADSL router' private IP is 192.168.1.1/24
- AP' dinamic IP is 192.168.1.71 (DHCP)
* SM site:
- SM' network mode is router mode
- Wireless dinamic IP is 192.168.1.61 (DHCP)
- Ethernet' IP is 10.1.1.254, and support DHCP server
Does your ADSL router have a static route for 10.1.1.0/24 that points to 192.168.1.61? As jluthman mentioned, router mode means NAT is not done on the SM. You'll either want to add a route on the DSL router and statically set the WAN address of the SM, or just use NAT mode on the SM.