PIX - 3 Interfaces and Two ISP (One of them Cablemodem w/DHCP)
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.
Re: PIX - 3 Interfaces and Two ISP (One of them Cablemodem w/DHC
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.
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UpdatesDocuments PurposeNAT Operation in ASA 8.3+ SectionsRule Types
Network Object NATTwice NAT / Manual NATRule Types used per SectionNAT
Types used with Twice NAT / Manual NAT and Network Obje...
Table of Contents Introduction:This document describes details on how
NAT-T works. Background: ESP encrypts all critical information,
encapsulating the entire inner TCP/UDP datagram within an ESP header.
ESP is an IP protocol in the same sense that TCP an...