Dynamic/Redundant Routing
 

Hi all,

Im trying to set up a redunant network, and have not been very sucessful at it.

Here is what i have:

Site A Connects to Site B (this is a constant connection)

Site A Is main site

Site B is back up

Client is connecting to Site A (but also has a connection to Site B)

When There is a connection to Site A i want all traffic from the client to come accross that Line.
But if for some reason the connection from the client to Site A is no good, i Want the Client to be redirected to Site B .. and have its IP forwarded on To site A via the Connection between the 2 sites.


My problem is that i have no idea how to setup the client side so that when The connection drops on A it goes to B..

Thanks in advance...

I am still rather new to this but if you need more info ask and ill provide it

well this generally looks like chapter 4 of lartc.org but you've not detailed what the connections actually are, how they are being managed etc..

Okay well for my test lab the connections are standard Ethernet 10/100 and ISDN lines

so how do these isdn lines terminate? are they both connected to a single linux server??

Okay so I made a mistake.. and miss read what is needed... What i need is for a Linux Box that has a Internet Conection to be able to route to a different Site if the connection To the First site goes down.

FW Connects To the Internet and in a Way VPNS to Site A
Site A and B are connected Through a Dedicated T1 Line

Here is a Diagram of what we have.

FW - Linux Fire Wall
MD - Modem



FW---MD------ Internet ------- Site A / Site B



The normal Connection is To connect to Site A, but if the connection fails to Site A from the internet Side. I want to be able to have the FW Route to Site B automatically. Right now i have to add the route to Site B if the connection To Site A fails.

I want to know how to Configure IProute2 to work in this Way. All connections are using TCP/IP

ok, at a basic level it's none of your business if either site fail. you can not influence the route your traffic takes to get to a destination address on the internet once it has left your lan. the only way to get near what you seem to be asking for is to establish a vpn to both sites and then route across either oe of the two fo them accordingly.