Router movistar: 192.168.1.1
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AP
192.168.1.245
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Router				Linux
192.168.1.1 		eth0 192.168.1.10
			eth0:1313 192.168.1.x

Configuración Linux
allow-hotplug eth0
iface eth0 inet static
        address 192.168.1.10
        netmask 255.255.255.0
        network 192.168.1.255
        broadcast 192.168.1.1
        gateway 192.168.1.1
        dns-nameservers 8.8.8.8
        dns-search tudominio.com

allow-hotplug eth0
iface eth0 inet static
        address 192.168.1.x
        netmask 255.255.255.0
        network 192.168.1.255
        broadcast 192.168.1.1
        gateway 192.168.1.10
        dns-nameservers 8.8.8.8
        dns-search tudominio.com


	AP
	address 192.168.1.245
	netmask 255.255.255.0
	network 192.168.1.255
	broadcast 192.168.1.x
	gateway 192.168.1.10
	dns-nameservers 8.8.8.8 #google
	
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Ahora en el DHCP Server tienes q poner la red 
apuntando a tu tarjeta 1313