I do hope that someone offers you a better solution, but I wonder what would happen if you used the same name and password for both central site routers to get around the authentication issue (assuming there isn't anything in your topology that would preclude you from doing so)?
I see some problems with this though. First, it seems like you would have to dynamically assign your IPs to the remote site BRIs or use unnumbered since you don't know which site you will be successfully calling. Also, I think you would need a routing protocol since it isn't firmly predefined which networks are reachable via which other networks/interfaces. So then you run into problems bringing the connection down due to routing updates. I would guess there are probably other issues but those are what immediately come to mind.
Have you thought of having the central site initiate the Dial in the event of a route loss. Both routers will attempt to dial the down site until a connection is made. (remember a static route floating or not is only injected into the routing table once it can see the other side.) Once one router makes the connection it will redistibute the route eigrp wieght of 170 into the other Dial router and the 2nd router will stop call attempts. provided you are using a weight of 200 in your static routes.
[toc:faq]The ProblemOn traditional switches whenever we have a trunk
interface we use the VLAN tag to demultiplex the VLANs. The switch needs
to determine which MAC Address table to look in for a forwarding
decision. To do this we require the switch to do...
[toc:faq]Introduction:Netdr is a tool available on a RSP720, Sup720 or
Sup32 that allows one to capture packets on the RP or SP inband. The
netdr command can be used to capture both Tx and Rx packets in the
software switching path. This is not a substitut...
IntroductionOSPF, being a link-state protocol, allows for every router
in the network to know of every link and OSPF speaker in the entire
network. From this picture each router independently runs the Shortest
Path First (SPF) algorithm to determine the b...