2 ISPs 2 routers 2 networks and a failover

[bloodalgia]

Hello all,

Recently we installed a new Motorola controller (for a wireless network) and connected to the local network through a switch.So, what we have is the following:

2 ISP lines
Router A (linksys) main router --connected--> ISP 1
Router B (D-Link) secondary --connected--> ISP 2
Motorola router (rfs 4000) --connected--> Cisco Switch --connected--> Router A
DNS server --connected--> Cisco Switch --connected--> Router A


Router A is given IP (192.168.2.1)
Router B (192.168.0.1)
Motorola (192.168.2.99)
DNS (10.6.2.1)

As you can see nothing is connected to router B and thus ISP 2, the LAN computers are given static IPs of (10.6.2.x) with gateways of 192.168.2.1 (router A) , the plan is :
1- Connect motorola router to the router B.
2- Disable the DHCP from router A and B.
2- (The major issue) We need to make ISP 2 the failover line in case ISP 1 fails.

I was thinking of giving the router B the same IP of router A and to switch the cables between routers in case one of the ISPs go down, I dont think this is a professional solution so I'm looking for serious ones.

 

[das_stig]

Router A/B <--> Cisco Switch <---> Moto Wirless

Router A : Static 192.168.1.1 - DHCP ENABLED, DNS DISABLED
Router B : Static 192.168.1.2 - DHCP DISABLED, DNS ENABLED
Switch : load Balance config between the routers IP's.

You can switch DHCP/DNS functions if one ISP has faster DNS response than the other.
Which ever router does DHCP/DNS, the other must have its option pointing to that router.

 

[Skippy27]

The only way you are going to get failover without physically doing something is to have a router that has 2 WAN connections and provides this feature.

Otherwise I would recommend you configure them both the exact same and then simply don't connect your switch to which ever one you want to be the failover. If A goes out, then plug your switch into B and all is good.