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How to use the private subnet between ASA and Router

ndaungwe
Level 1
Level 1

Guys,


Here is the context:

I am connecting to 2 ISPs for load sharing traffic coming from my private network.
The 2 links from the ISPs terminate in the router which connects to an ASA via a private subnet, back to my private network.
I have configured PBR in the router, to prefer ISP1 for trafic coming from my internal servers X, Y, Z  (public addresses, no need for the ASA to translate).  The router  should send any other traffic coming from the rest of my private address space, servers W, V, U  (after translation by ASA) to ISP2.

So far so good.  The default route defined on ASA points to the internal LAN interface of the Router (private ip address). How can I route this subnet used between the ASA and Router? Being a private address I have to translate it to something (public) before the router can send it out. But translate to what?
Alternatively I could use a public subnet. But I do not have any.How do I get aroung this?

Regards

Ndaungwe

1 Reply 1

andrew.prince
Level 10
Level 10

You have IP addresses on the direct interface links to the ISP's?? You ccould use those IP addresses with NAT overload.