In a network where clients are on a different subnet than the server assigning network addresses, and the clients are not receiving addresses, what router interface configuration is needed to fix this problem?
Configure ip helper-address [server address] on the interface.
To allow clients on one subnet to obtain addresses from a server on a different subnet, the router interface connected to the clients must be configured with the ip helper-address command followed by the server's address. This command tells the router to forward broadcast packets, such as DHCP requests, to the specified server. Setting up a local address pool configures the router as a DHCP server, which isn't necessary when an external server exists. Enabling a relay agent globally doesn't apply the necessary configuration to the specific interface. Assigning the server's address to the interface is incorrect and can lead to address conflicts.
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