I have 3 sites and i ant to interconnect them with OSPF. IOS feature set allows it. Pls look at the attachement.
There are Cisco 3750 switches stacks on each site. The problem is site 1 has two stacks connected via trunk line. I need to keep this trunk working and implement optimal routing.
What is the correct way to start OSPF routing between the stacks on Site 1?
Will it be correct if I create new vlan on Stack 1 and 2 only for ospf connectivity, and declare all other vlans passive-interfaces?
Or is it better to make routed link between stacks (and keep existing trunk too) and run OSPF over this link?