Ok.
Besides bridge mode..
Choice number one: Double NAT.
#1 Both routers must be in two different subnets.
For example one at
192.168.1.1 and the other at
192.168.2.1#2 To allow users from the network of networks that spans the globe (other knowns as the Internet) to connect through the second router..
a) Port forwarding can be done twice.
http://portforward.com -> Guides -> Port Forwarding Behind Two Routers?b) OR one can use the DMZ feature in the first router to send all traffic to the second router
http://www.pcwintech.com -> Routers -> Router Help -> How To Setup Two or More Routers Together#3 If this 2Wire 3600HGV does
NOT have only one RJ-45 LAN port, I do not recommend allowing users from Internet to connect through the second router... Instead..
a) I would recommend having only the computers that you want users from the Internet to, to be connected wired or without wirelress to the 2Wire 3600HGV.
b) Points to
grc.com -> Research -> Recent -> NAT Router SecurityChoice number two: Converting the second router into a Hub/Switch/Wap.
While each router and OS (and Version of the OS - for example Windows XP ) is different, I can give the steps.
#1 User must know how to release and release the IP Address of their computer, if their computer is not setup to use a Static IP.
#2 User must know how to change the Static IP on their computer, if their computer is setup to use a Static IP.
#3 User must make sure that they have at least one RJ-45 LAN port occupied on the second router.
#4 In the primary router that is handling the public IP (most likely will be the 2Wire 3600HGV - in your case), one must:
a) Find the DHCP range of it.
b) Make sure the DHCP range does not occupy the whole subnet.
c) Adjust the DHCP range of it, as need be (if it occupies the whole subnet).
For example if the primary router that is handling the public IP has the LAN IP of 192.168.1.1, the Starting IP Address of 192.168.1.2 and the Ending IP Address of 192.168.1.254, one can make the Starting IP Address 192.168.1.100
#5 User must make sure that the second router is not connected to the primary router.
#6 In the second router, one must make sure that router is not setup to use a Static WAN IP that is in the same subnet as the primary router.
#7 As need be, one must turn off and turn back on the power to the second router.
#8 In the second router, one must then: Change the LAN IP of it so that it is in the same subnet as the primary router and the second router's LAN IP must be outside of the DHCP range of the first router.
For example if the primary router's LAN IP is 192.168.1.1, the Starting IP Address is 192.168.1.100 and the Ending IP Address is 192.168.1.254, then the second router's LAN IP could be 192.168.1.2
#9 User must release and renew IP Address (if not setup for DHCP) / User must change the Static IP on computer to match the subnet of the second router (if setup to use a Static IP)
#10 User must disable the DHCP Server in the second router.
#11 User must connect one of the second router's LAN Ports to the primary router's LAN port(s).
#12 Again: User must release and renew IP Address (if not setup for DHCP) / User must change the Static IP on computer to match the subnet of the second router (if setup to use a Static IP).