PIX - 3 Interfaces and Two ISP (One of them Cablemodem w/DHCP)

eestevez · ‎11-04-2003

Hi,

I have a PIX 515E with 3 interfaces, I need to use one interface for the inside network and the other two interfaces with two different ISP one of this ISP has a static public ip address and the other has a static public ip address asigned via a reservation in a dhcp scope.

I like to configure the pix so if one of the links goes down the other will serve the network.

I can't use BGP for many reasons, so the only resource I have is the PIX and your help.

Thanks in advance.

scoclayton · ‎11-04-2003

Unfortunately, there is no way to accomplish this without manual intervention. The problem in this case is that you cannot create 2 default routes which is what you would need in this case (with different metrics). With 6.3, the PIX now supports OSPF. You could setup 2 routers outside one interface on the PIX to feed in 2 default routes, one with a higher metric that the other. However, in your case one of the ISP conns looks like a cablemodem which probably does not support OSPF. Hope this helps some.

Scott