zakladny router - WAN port nastavis podla info od providera
LAN - das napr. 192.168.0.1 maska 255.255.255.0
zapnes NAT

ine routre
WAN porty: nastavis staticky:
1 - 192.168.0.2 maska 255.255.255.0
2 - 192.168.0.3 maska 255.255.255.0
...
5 - 192.168.0.5 maska 255.255.255.0

LAN strana

nastavis aby kazdy router mal inu siet, napr.
1 - 192.168.1.1 maska 255.255.255.0
...
5 - 192.168.5.1 maska 255.255.255.0
NAT mozes zapnut, ale nemusis.

predpokladam, ze 'ine' routre su vsetky pichnute do LAN portov zakladneho d-linku