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In an OSPF multi-access domain, what would happen if two routers are configured with the same Router ID and priority?
The highest numerical loopback address is chosen.
The OSPF process is restarted and RID configuration is removed.
They will become neighbors after completing the Loading OSPF state.
They will not become neighbors with any router.
The one with highest IP will be Designated Router.
When OSPF process starts, by default it chooses the highest IP address of the router as Router ID. If a loopback address is configured, then this IP is considered as the Router ID, because loopback addresses are considered to be stable. However if the Router ID is configured and no priority is set, then the two routers are unable to become neighbors because they see their own RID in the messages, then an error occurs. For more information refer to: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/23862-duplicate-router-id-ospf.html Or refer to: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/23862-duplicate-router-id-ospf.html
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