This is the current setup that I have:
Zyxel P660 (router mode, DHCP ON) <-- LP-8186 (WAN port, Bridge mode DHCP disabled) <--- wired + wireless clients
With the above setup, both wired and wireless clients can connect to the Internet no problem. However, I noticed that I lost port forwarding for uTorrent.
How do I cascade these two routers? I've already configured my PLDT modem as router. I would also like to use the DHCP server, NAT and Firewall of the LP-8186.
If anyone can point me to an easy to understand tutorial I would be most grateful.
We have the same combo: Zyxel P660 + LP8186 running the network setup you want so i guess i can probably help you. (we just differ in the P660's firmware -- i still have PLDT's version.).
Physical Setup: P660 LAN port connected to LP8186 WAN port (so we freed up an LP8186 LAN port as a bonus)
Router(s) Setup: P660 is in router mode. LP8186 is also in router or "gateway" mode.
Network Setup: Because we have both devices in router mode, we must have two subnets.
The first subnet is used exclusively by our two routers where the P660's LAN port can talk directly with the LP8186's WAN port. In this subnet, i used the IP address range from 192.168.1.0/255.255.255.0
LAN IP setup of P660 has static IP address 192.168.1.1 netmask 255.255.255.0
WAN IP setup of LP8186 has a static IP address 192.168.1.2 netmask 255.255.255.0 with a default gateway pointing to 192.168.1.1 (the P660)
The second subnet is for our LP8186 to communicate directly with our wired and wireless computers and to handout DHCP addresses.
In this subnet, i used the IP address range 192.168.2.0/255.255.255.0
LAN Setup of LP8186 has IP address 192.168.2.2 netmask 255.255.255.0 where the default gateway is left as 0.0.0.0
To activate LP8186's DHCP features, set the DHCP mode to "server" and punch in the DHCP client range IP addresses like 192.168.2.100 - 192.168.2.200 (taken from the second subnet). (You can then turn off DHCP on the P660 'cause it will be useless)
LP8186's NAT and firewall is already active when it's in router/gateway mode.
Now to make port forwarding work across your two routers and allow you to control the port forwarding mapping on the LP8186, you must do the following:
On the P660, you must enable NAT (of course) and set 192.168.1.2 (the LP8186 WAN IP address) as the "default server" for Port Forwarding.
On the LP8186, enable IP Port Forwarding feature and define your torrent ports there.