Sorry for the delay, @mbundy999... apparently my notifications aren't getting through properly.
If you're only looking to track router status rather than link status, this shouldn't be too hard. HSRP or VRRP will do the trick. GLBP doesn't really make sense here because you will never have both links active at the same time, so load-balancing won't happen anyway.
On the primary router, you can configure your PPPoE dialler with a persistent connection. On the backup router, configure the PPPoE dialler for dial-on-demand with a fairly aggressive timeout for activity.
You can then configure your HSRP/VRRP between the two routers. The primary should be at the highest priority and configured for pre-emption. The backup should be configured for lower priority. Pre-emption is unimportant on the backup because it will never have a higher priority than the primary.
Because it has a persistent connection, the dialler interface on the primary router will stay up and handle traffic on the EFM connection. The backup router, even though it has a dialler interface, will not engage the PPPoE session unless it becomes the default router and starts receiving interesting traffic. When it does, it will engage the PPPoE session and (as long as the ISP realizes that the primary's session is down) will take over the link.
When the primary router comes back on-line, it will take over the HSRP/VRRP virtual IP and will start routing traffic over its own dialler interface. The interface may not come up right away if the backup router is still using it, but the aggressive activity timeout will cause the PPPoE session to drop fairly quickly and will allow the primary to establish once this occurs.
