Cisco 4331 – High Availability Configuration in Cisco 4331 Routers

As discussed in chat, PBX / SIP traffic is unique to an IP host route in your case. Therefore, you can remove PBR and use tracking objects on overlapping static routes, which go out different dialer interfaces to solve the problem.

ip route 89.123.45.10 255.255.255.255 Dial0 track 1 1 name PBX_Pri
ip route 89.123.45.10 255.255.255.255 Dial1 track 2 10 name PBX_Bak
ip route 0.0.0.0 0.0.0.0 Dial 1 track 2 1 name Data_Pri
ip route 0.0.0.0 0.0.0.0 Dial 0 track 1 10 name Data_Bak

I can't figure out why you are running two instances of OSPF on the the 2900's. This looks way more complicated than it needs to be. You can run OSPF in passive mode on the firewall and distribute a default route from the 2900's. You put a static route on the 2900's for your /24 pointed at your firewall outside IP. Since this is active/standby, if the firewall fails over, the IP address moves with the active firewall. There really is no need to announce anything from the firewall, it is just listening for a default. If you are announcing a default, there is really no need for HSRP either, that can go away. The firewall will just send the traffic to where it hears the default. It might well load balance to both 2900's, though.

Seems you are making it a lot more complicated than it needs to be. There is only ONE firewall address in this configuration so a static route will work just fine. Even so, there is no need for more than one OSPF instance and the only thing you are using that for is to handle the case where a router dies. Then the firewall uses the remaining path where it hears the remaining default route.