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An interface on an OSPF network has been very unstable, compromising the entire OSPF network to frequent LSA restarts. Which of the following solutions is most likely to fix the issue?
Manually assign a Router-id to 1.1.1.1 and dont assign it to any interface.
Set the Router-id to the smallest IP address of an active physical interface.
Configure the router-id and set it to a loopback interface.
Choose the highest IP address assigned to an active physical interface as Router-id.
The RID uniquely identifies the router on the OSPF network. If the Router ID "RID" is not manually configured, then the highest logical (loopback address) IP address configured on a router will be chosen as RID. If no loopback interface is configured then the router uses the highest IP address configured on its active interfaces. The best way to configure a Router Id is to assign it to a loopback address, because loopback interfaces are stable, and will not compromise the OSPF database. For more information refer to: https://learningnetwork.cisco.com/thread/4846
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