Re: Simple route/gateway forwarding

Hi,

On Mon, Apr 05, 2010 at 10:33:01AM -0400, James Smallacombe wrote:
> 
> This is really basic, but since I've never tried it before (and it's
> not working), I want to see if it's possible, one way or another:
> 
> customer has a network hooked up to provider A using provider's CPE
> router.  They also have a 2811 doing NAT, which is the default
> gateway for the NAT'd network 192.168.0.0/21.  The 2811 then has a
> default route to the CPE router and a typical "internal" Ethernet on
> 192.168.7.1 and an "external" Ethernet on Provider A's static IPs.
> 
> To this, they add a second connection, a business broadband
> connection using a typical broadband router (NetGear, I believe) to
> provider B. They know their provider A static IPs, won't route
> through provider B's network, but certainly the NATed 192.168.
> network will.  I stick the Netgear on the same Ether as the 2811's
> internal interface and give it 192.168.7.10.  All workstations use a
> default gateway of 192.168.7.1.  The idea is to be able to switch
> them over to 192.168.7.10 without having to change their settings,
> by just re-routing some networks on the Cisco to provider B.  I
> tried this as a test:
> 
> ip route 192.168.3.240 255.255.255.255 192.168.7.10
> 
> Similar to a ppp /32 route.  However, all traffic from 192.168.3.240
> still goes out the default route to provider A via the default
> route.  Is there a way to make this work without subnetting
> 192.168.3.0 and putting aliases of it on one or both routers?

Cisco now has some nice features to dynamically change static routes
based on results of ping tests. This looks a bit like your setup:

   http://www.nil.com/ipcorner/SmallSiteMultiHoming/

Mark



-- 
Mark G. Thomas ([email protected])
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