I seem to have a similar problem on my TEW-632BRP with TRENDNet router which has Atheros AR9130.
I am runing DD-wrt SVN revision 18024, which is relatively new.
There is no Repeater option in the selection box. I have Client, Client Bridge (routed), AP, WDS AP, WDS Station...
I am missing the repeater option very much.
Is it an issue with my router that does not support it or should I get a different build of the program? Currently I am runing the Client bridge (routed) mode which is working fine but I would prefer the Repeater variant.
Aha, so the virtual interface would in effect make it into a repeater.
When I enable it, it does transmit an SSID. There aren't many settings to apply, no secutity options you speak of. I can connect to the newly established network but there is no Internet or Net access. It seems I am not getting an IP.
Can you point me to some instructions or help me yurself. I feel I'm getting close to the solution. Maybe your help will get me there.