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(ASCEND) /32 Summarization? and dial backup

I am trying to implement automatic dial backup for my POP's.  Most pop's
have at least 2 MAX 4000's and a Cisco 2501.  The Cisco is connected to
our backbone which is also Cisco.  EIGRP runs on the backbone.  

Currently we have static routes on the 2501's to the MAX's for dialup
pools.  Those static routes are redistributed into EIGRP.  All works
perfectly fine.

I have devised the following scheme for dial backup:

1) Cisco advertises default route via RIP to all the MAX's
2) One Max has a static default route (with a higher preference)
   to the LAN interface of a remote TNT.
3) The connection profile to the TNT is defined and active
4) The TNT advertises RIP into the backbone which is 
   redistributed into EIGRP
5) The profile on the TNT is also active (I filter out the /32
   corresponding to the LAN interface of the remote MAX).
6) The "primary max" in the POP advertises its default route 
   as well with a higher metric than the Cisco

This all works perfectly.  If the Cisco link goes down, it stops
advertising the default route and the "primary max" makes the call
to the TNT.

Now, the primary MAX advertises RIP2 to the TNT.  This means lots
of /32's.  When the leased line comes back up, the Cisco again
begins to advertise a default route.  The MAX's then start sending
data to it.  However, because the /32's advertised via RIP are
more specific than the /28's we advertise via EIGRP, data will
continue to flow TO the POP via the ISDN backup.  The link will
never drop.

So, obviously I need to find a way to advertise with the same
specificity over the leased line and the dial backup.  However,
I do NOT want a bunch of /32's flying around my backbone.

I know all about "pool-summary=yes".  But we define our pools in
RADIUS.  We cannot change this because we have more than 10 pools
in a POP which is the maximum that a MAX allows to be defined.

I had a few untested ideas.  I'd appreciate comments on them:

1) Define static routes on the TNT for each backed-up POP.  This
   will work because I have changed the distance of RIP on the
   Cisco to 180 so it always loses to EIGRP.
2) Have RADIUS install all of the routes dynamically when the
   ISDN backup comes up

BTW, OSPF is not an option since Ascend gives you a choice between
ATMP and OSPF and we need ATMP.

Thanks in advance.

Mike

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