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Policy based routing. This is the only way for the router to check and re-route traffic in the event your primary link goes down, however this usually requires two interfaces. <br />
<br />
<a href="http://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/100658-ios-nat-load-balancing-2isp.html" rel="ugc">http://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/100658-ios-nat-load-balancing-2isp.html</a><br />
<br />
This is an example of how it would work.
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Understood. I can't provide another interface and don't to be as backup connection. I would like to have policy based routing that certain traffic route to different gateway. If you know how please let me know.
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Can you show or visually show how your setup is now? I need to see exactly what is going on in order to properly try to help you.
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i have picture attached. <a href="https://filedb.experts-exchange.com/incoming/2016/02_w09/1083188/Brief-Remote-Connection.PNG" target="_blank" title="Current Remote Network (70 KB)"><img alt="Current Remote Network" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2016/02_w09/800_1083188/Brief-Remote-Connection.PNG" /></a>R1 router to RS3 router provide slow internet connection. I would like to have clients on 10.13.0.0 to use RS2 internet Router for their internet use.
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Brief-Remote-Connection.PNG

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Many questions still needed from this diagram:<br />
<br />
1. How are these routers connected? MPLS? Internet? <br />
2. What routing protocol are you using on your WAN? BGP? EIGRP? RIP? <br />
3. Is there no way for R3 to talk to R2 without having to go through R1? Avoid excessive traffic if you can go full mesh (multi p2p)<br />
<br />
Essentially you will have to use PBR to accomplish this but answer these first.
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1. How are these routers connected? MPLS? Internet? <br />
&nbsp;it is 20mb Metro E line between all routers. similar to MPLS according sale rep. <br />
2. What routing protocol are you using on your WAN? BGP? EIGRP? RIP? <br />
not sure ---<br />
3. Is there no way for R3 to talk to R2 without having to go through R1? Avoid excessive traffic if you can go full mesh (multi p2p)<br />
Yes. R2 can talk to R3 directly. <br />
<br />
Thanks for your help!!
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<div class="content wysiwyg-content">
Is there anyway to configure Cisco 1921/K9 WAN load balance? Interface 0/0 connected to two different WAN sources and using one of as primary. How do i use it configured as second WAN? <br />
<br />
ip nat inside source list 199 interface GigabitEthernet0/0 overload<br />
ip route 0.0.0.0 0.0.0.0 10.255.255.1<br />
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0<br />
ip route 10.13.0.0 255.255.0.0 172.18.0.2<br />
ip route 10.16.0.0 255.255.248.0 10.255.255.3<br />
<br />
IP address 10.255.255.1 is currently provide WWW connection. How do set ip 10.255.255.3 as second WWW connection?
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Is there anyway to configure Cisco 1921/K9 WAN load balance? Interface 0/0 connected to two different WAN sources and using one of as primary. How do i use it configured as second WAN? 

ip nat inside source list 199 interface GigabitEthernet0/0 overload
ip route 0.0.0.0 0.0.0.0 10.255.255.1
ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0
ip route 10.13.0.0 255.255.0.0 172.18.0.2
ip route 10.16.0.0 255.255.248.0 10.255.255.3

IP address 10.255.255.1 is currently provide WWW connection. How do set ip 10.255.255.3 as second WWW connection?

Cisco Router WAN load Balance

Cisco PIX is a dedicated hardware firewall appliance; the Cisco Adaptive Security Appliance (ASA) is a firewall and anti-malware security appliance that provides unified threat management and protection the PIX does not. Other Cisco devices and systems include routers, switches, storage networking, wireless and the software and hardware for PIX Firewall Manager (PFM), PIX Device Manager (PDM) and Adaptive Security Device Manager (ASDM).

Cisco

A router is a networking device that forwards data packets between computer networks. Routers perform the "traffic directing" functions on the Internet. The most familiar type of routers are home and small office cable or DSL routers that simply pass data, such as web pages, email, IM, and videos between computers and the Internet. More sophisticated routers, such as enterprise routers, connect large business or ISP networks up to the powerful core routers that forward data at high speed along the optical fiber lines of the Internet backbone. Though routers are typically dedicated hardware devices, use of software-based routers has grown increasingly common.