Ask PACBell for a /24 and coordinate with the govt ISP to route it and do
BGP. There's also a very intersting article on Cisco somewhere about using
NAT in this situation. Check this out:
http://www.cisco.com/warp/public/cc/pd/iosw/ioft/ionetn/tech/emios_wp.htm
I've never implemented it but would love to. Good luck,
Kenny
"Brian Wilcox" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> I am currently adding another circuit to an additional
> ISP for my network. I want to be able to use the
> first circuit for a redundant backup but am not clear
> on how to accomplish this.
>
> The setup:
> (diagram located at
> http://www.geocities.com/bwilcox_email/Routing_Design.html)
> - watch word wrap
> Internal LAN connected to two PIX's, one in failover
> mode. The PIX's current default route points to the
> old ISP (government). All of our internal (public)
> addresses are from the Government ISP's address space,
> which we have a /25 block. I'm currently NATing my 10
> net to this pool. I have an internal web server that
> the users need access to from outside the network.
> I'm adding the new circuit via PacBell and would like
> traffic to take that route and failover to the
> Government ISP.
>
> First solution: do BGP. Well, I can't. I only have a
> /25, too specific, from the Government ISP and I have
> to maintain the same address space. So my next
> thought would be to PAT everything out the PacBell
> circuit. That's fine and dandy but then the web
> server will reply to the source with a different
> address. I'd like to route the web server to the
> Government ISP. The only way I can think of doing
> that is via some sort of route map or policy map.
>
> Any comments would be greatly appreciated.
>
> Thanks, Brian
>
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