Cisco ASA 5525-X Add additional IP address space to outside interface

I have a Cisco ASA 5525-X running 8.6(1)2.

We have utilized all of the IP address space that our ISP initially provided to us. The ISP has assigned an additional non-contiguous block of addresses to us.

The ASA doesn't support secondary addresses on interfaces. What other options do I have?

Break the outside interface into sub-interfaces and trunk with dot1q. How would I handle routing with 2 (or more) external interfaces (which to use as default)?

Set up a second physical outside interface. Again, how to handle routing with 2 (or more external interfaces?

Other ideas?
Robert BrileySenior Network EngineerAsked:
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Jan SpringerCommented:
you don't put it on as a secondary.

as long as your provider routes it to you and you configure either the static nat entries or the nat pool, it will work

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