I have a Cisco 1811 router that has two FE WAN Ports. Each FE WAN port connects to two separate ISP routers (call them ISP1 and ISP2). Internet speeds are: ISP1 is a 512k Fract-T1 and ISP is a Full T1. On the LAN side of the 1811 there is a Nomadix gateway that connects to Fe0/1 that provides DHCP and also does the NAT'ing (both overload and static using IP's from ISP1). Drawing is shown below. Can anyone explain how to configure the 1811 router to allow for load sharing and failover without using BGP since ISP2 doesn't allow BGP?
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