Two routers are configured with OSPFv3. OSPFv3 is enabled on all interfaces of each router. Which of the following is true in the event that the network administrator does not configure a Router-ID?
A. The IP address of the loopback 0 interface will be used as the router ID
B. The IP address of the loopback 1 interface will be used as the router ID
C. The IP address of interface G0/0/0 will be used as the router ID
D. No router ID will be assigned to the router.
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Can you give us explanation for this answer please ?
Router ID needs to be manually configured in OSPFv3. If not configured, then you would have nothing hence answer is D. The main keyword here is OSPFv3, only in OSPFv2 and so on, then router ID will be automatically assigned if im not wrong.