Election 1
Bridges initially assume they are the root
- uses its own ID as root, with zero cost
Bridges save “best” configs they hear on each port (or its own):
- C1 > C2 if root(C1) < root(C2), otherwise
- C1 > C2 if cost(C1) < cost(C2), otherwise
- C1 > C2 if bridgeID(C1) < bridgeID(C2)