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Cisco 1811 Router Configuration - Two Internet Connections - Redundancy

Anyone have good examples of configuring two Internet connections in a Cisco router?
Details:
Current Configuration:
-1 Cable Internet Connection w/static
-Client to Site vpn's setup on this static
-Our Exchange Server Domain name is using this static for RDNS etc

Wanted Configuration
-2 Internet Connections w/ 2 statics
-Redundancy
-Exchange to stay on cable Internet connection
-Cable Internet connection for fall over/ secondary
-New second DSL connection as Primary web traffic connection

I have configured both cable and dsl connections independently in Cisco routers before but I have never had two connections in 1 router.

Also, if anyone can recommend best practices for this kind of setup please feel free. ie. Exchange on separate connection etc.
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considerscs
Asked:
considerscs
2 Solutions
 
jrichesinCommented:
All you have to do is configure the interfaces and then use NAT to get to the proper hosts for the services.


for example
int fa0/1
ip address 67.210.210.2 255.255.255.252

int fa0/2
ip address 67.192.201.2 255.255.255.252

ip route 0.0.0.0 0.0.0.0 67.210.210.1
ip rotue 0.0.0.0 0.0.0.0 67.192.201.1

ip nat inside source list 105 interface fa0/1 overload
ip nat inside source list 106 interface fa0/2 overload

then make your access lists to control what traffic goes out what provider.



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Syed_M_UsmanCommented:
YOU REQUIRE FOLLWINGS

1) your router should have 2 wan ports
2) configure lease line on wan 1 (serial 0)

for example
int serial/1
ip address X.Y.Z.A 255.255.255.252 or 255.255.255.248 ( as per IP scheme)

3) configure ADSL line on wan 2 (PPEO-Dailer 1-2)
as you mention you know how to configure

if your require NAT, you can take help from
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_tech_note09186a0080094e77.shtml

4) configure NAT for exchange on wan 1
5) configure OWA for exchange on wan 1
6)create static router topermit traffic on wan2

for static routes please see this
http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a00800ef7b2.shtml
http://www.cisco.com/en/US/docs/security/asa/asa82/configuration/guide/route_static.html

7) Site to site VPN
http://www.cisco.com/en/US/docs/routers/access/1800/1801/software/configuration/guide/vpngre.html
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