Animal control HQ must take an OSPF core router offline for a firmw…

Question

Animal control HQ must take an OSPF core router offline for a firmware window without black-holing traffic mid-drain. Which technique lets neighbors reconverge away from the box before adjacencies are torn down?

Accepted Answer

Enable OSPF graceful shutdown so the router floods max-metric LSAs, then drops adjacencies after neighbors reconverge — Picture the HQ router as a busy highway off-ramp you’re closing tonight. Graceful shutdown first posts ‘detour’ signs (max-metric LSAs) so cars leave the ramp, then it closes the gate. A hard process clear just yanks the ramp with traffic still on it.

Answer

Clear the OSPF process with a hard reset so neighbors rebuild from an empty LSDB immediately

Answer

Lower Hello and Dead timers to sub-second values only on the maintenance router

Answer

Advertise a default route with administrative distance 1 toward the maintenance router

Animal control HQ must take an OSPF core router offline for a firmware window without black-holing traffic mid-drain. Which technique lets neighbors reconverge away from the box before adjacencies are torn down?

Short Explanation

Full Explanation