You have configured a router with an OSPF router ID, but its IP address still reflects the physical interface. Which action can you take to correct the problem in the least disruptive way?
Suggested Answer:A🗳️
Once an OSPF Router ID selection is done, it remains there even if you remove it or configure another OSPF Router ID. So the least disruptive way is to correct it using the command ג€clear ip ospf processג€.
It can be loopback because the rules to select the router ID
1. Manual configuration of the router ID (via the router-id x.x.x.x command under OSPF router configuration mode).
2. Highest IP address on a loopback interface.
3. Highest IP address on a non-loopback and active (no shutdown) interface.
In this question we already have a manual router ID, so even if you configure a loopback, manual router ID still will be the priority
Router id is not an IP address, the question confuses the two. (It can be the same as the IP address, for sure. But in the end, it is just an independent 32-bit id, and the only criteria, from OSPF point of view, is that it needs to be unique). Just nitpicking.
I'm leaning towards the answer given A. If the explanation is accurate, it shouldn't be B (especially if you configured router-id x.x.x.x as indicated in problem statement). Clear ip ospf process temporarily restarts the neighbor relationships and there is disruption but my understanding it is only temporary. OSPF is self-healing with the hello packets so the OSPF routers should reconverge.
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