The EAP600 cannot be set as a wireless repeater on both the 2.4GHz and
5GHz radios, because that will cause an IP conflict as the EAP600 will be
detected twice by the router. The customer must choose which band will act
as the backhaul. As illustrated below, when Repeater mode is selected by
one band, the other band loses the Repeater mode option.

 

Figure 1: EAP600 2.4 GHz band in Repeater mode.

 

Figure 2: EAP600 5 GHz band in Repeater mode.