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A router is configured in an OSPF network. The interface associated with the Router ID is very unstable, what is the best solution so that the DR/BDR maintains stability?
Configure a loopback interface instead.
Modify the IP address to be higher.
Change the IP address to be lower.
Set the "broadcast" keyword on the interface.
If not configured, a router will choose its Router ID RID, from the highest loopback address (a loopback is stable and will never shut down as a physical interface may). If no loopback address is chosen, then the highest physical IP address will be chosen to become the RID of the router.
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