I am in the process of preparing a network design. I can use only OSPF. I am wondering if Static Routes alone will meet my requirement. Please refer the attached diagram and kindly let me know experts opinions. I need good failover and load sharing at each location.
4 locations, location Z is connected to internet, so all the routers should point to Z as default gateway.
You can always use static routes in the scenario but you need to have manula intervention everytime you want the link to fall back.
What you can do is to run OSPF on the LAN and redistribute your default route from the ASBR as a type1.
If an ISP link fails the ASBR would stop advertising the default to the campus.
This will ensure that from the LAN they take the best route to reach the ASBR and also ensure proper fallback to the other ASBR.
HTH, rate if it does