Hi all,
I'm having a problem to initiate a backup ISDN dial-up (DDR) when my main link is down. Below shows the physical connections of my network.
Router(ISP)--Microwave Radio--Microwave Radio--Router
--------ISDN (BACKUP)---------------
My client router is connected to the ISP router via microwave link. The microwave radio act as a bridge transparantly. The connection between the radios and my client router is "10 base-t". When the microwave link(main link) is down, my client router will initiate a dial-up to the backup ISDN link.
My problem is, the router 10base-t interface will see the physical int. and protocol is up even though the microwave link is down (which is normal) but data will not go through and it won't initiate the dial-up!
Is there any way that I can configure the router to initiate the dial-up when it sense that data is not going through the main link?
The routing protocol that I'm using is OSPF, the router on the ISP is Cisco 7500 and on the clien side is Cisco 2620. Hope you guys can help. Thanks.