Nuts and Bolts
Designated Routers and Adjacency
- In IS-IS all routers are adjacent (but adjacency is far less stateful)
- If DR dies, new DR must be elected, with short connectivity loss (synchronization is fast)
- DRship is deterministic (highest priority, highest MAC address always wins)
- DRship can be made sticky by cool NLSP priority hack (DR increases its DR priority)