How do I default to another provider but route AAPT traffic to AAPT?
If you want only traffic destined to a AAPT customer to be sent to AAPT and use another provider for all other traffic you should request an AAPT-only routing table and then use BGP communities to control the scope of your routing announcements. You can then use default to point non-AAPT traffic to your other provider. You should be able to do the reverse, i.e. default to AAPT, but you will need to check with your other provider to find out how to identify their local routes.
