Hi guys, I have this scenario: Two sites with two wireless links, ether1 and ether4 are used on the routers. I managed to add manually in routing>ospf>interface ether4 with a cost of 10 because I want it to be the primary and the backup is ether1 with a higher cost of 100.
In ip>routes my router shows dst address 0.0.0.0/0 and the correct gateway 10.70.3.137 on the correct interface ether4
however the traffic is still balanced between the “primary” and the “secondary” link and not being sent over the primary link exclusively.
I know this topic has been discussed many times in the past but after I made the changes it didn’t work as I thought it would, could you give me pointers on where to look?
Did you change the priority of the backup link on both sides of the link?
In which direction do you see traffic?
There will always be some, very small amount of, traffic on the backup link. That traffic will be OSPF neighbor association maintenance. If your primary link is lightly loaded, you might confuse the light load on the backup link for actual traffic.
Look at the routes to various subnets on both ends of the link to make sure they are pointing at the primary interface.
Look at “/routing ospf routes” on all routers to see the OSPF cost of the routes which are taking the backup path.
Are ether1 and ether4 connected to the same device on the remote end? If not, the routes may just be “closer” via ether1 than ether4 even with a cost of 100 on ether1.