Media for nat for multihomed network

nat for multihomed network

Here's my second stab at this question. Hopefully this attempt is clearer.

We have a 1700 with multiple internet links with different ISPs, different public blocks - NO BGP! Is there a way to configure multiple ip nat pools and ip nat inside source commands using the same inside source acl to work in a primary/backup scenario? Or perhaps something else in the IOS that does this transparently?

This document seems to imply a solution for this scenario but only gives a vague reference to the NAT part.

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then there's this

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Is Cisco OER dependent on the fact the user must have a routable block of addresses that can be routed through n+1 providers (n>0) or can Cisco OER still work if my internal addresses are not publicly routable blocks? A. Network Address Translation (NAT) can be used to influence outbound traffic using PBR or some special redirect filters. However, Cisco OER

1.0 is independent of NAT and the management of routable blocks of ISP addresses. Cisco OER does not change or affect NAT because it changes the exit after all the translating occurs. Cisco OER 1.0 does not assume or depend on any NAT capability.

But, we're not looking to use NAT in conjunction with PBR routing, just in conjunction with load balancing or OER over both links if possible, or at least with the secondary link if the primary goes down for internet traffic.

Thanks