Topology/Config….WAN router (RTR-A) has BGP session w/ ISP and is taking a 0/0 route ONLY. In the event the WAN connection w/ the ISP fails, an OSPF originated 0/0 route populates the route table of RTR-A, (from RTR-B) transit an OSPF neighbor b/t RTR-A and RTR-B…over an Ethernet segment. This Ethernet segment is always up and serves as a means of communication for production traffic.
Problem….WAN circuit on RTR-A is not stable and bounces up and down a lot, which we are investigating. When I say up and down I mean a whole lot of up/down transitions over a period of time, which in turn never gives traffic a solid and stable path over the primary or backup circuitry.
Question…how best can I configure this, while trying to keep it simple, so that the primary path is ignored for x amount of time once it goes down? I want the backup path to be taken via that OSPF 0/0 route and ignore the primary? Fairly easy solution if we’re dealing w/ ISDN, but not here. I’ve thought of dampening, tracking and some other things, but I want some feedback from you all before I dig too much more into this.
Thank you!
