An engineer is setting up a OSPF link-state routing protocol on a router and needs to ensure that a specific identifier is used for the router within the routing process, regardless of the addresses assigned to its interfaces. Which method allows the engineer to manually configure this identifier?
Assign the desired identifier to a loopback interface.
Configure a static route to the desired identifier address.
Use the "router-id" command under the routing process to manually set the router's identifier.
Adjust the interface priority to match the desired router identifier.
In OSPFv2 (Open Shortest Path First version 2), the router's identifier can be manually set using the router-id command under the routing process configuration. This command allows the engineer to specify a specific Router ID, ensuring it remains consistent regardless of interface IP addresses or their statuses. Assigning the desired IP address to a loopback interface can influence the Router ID selection but does not guarantee it if the loopback interface is not the one with the highest IP address or goes down. Configuring a static route does not affect the Router ID. Modifying the interface priority affects Designated Router (DR) and Backup Designated Router (BDR) elections, not the Router ID itself.
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Cisco CCNA 200-301
IP Connectivity
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