After you add an exclusion range (a set of IP addresses the server must never lease) to an active DHCP scope, what additional action-if any-must you normally perform for a Windows Server or Cisco IOS DHCP service to begin honoring the new exclusion?
Force all DHCP clients to release and renew their leases.
Restart the DHCP service on the server.
Deactivate the scope and then reactivate it.
No additional action is required; the exclusion takes effect immediately.
On modern enterprise DHCP implementations, such as Windows Server DHCP and Cisco IOS DHCP, configuration changes to exclusion ranges are committed immediately when you save or apply them. The server automatically updates its address-pool logic, so no manual service restart, scope toggle, or client lease reset is necessary. Deactivating the scope, restarting the service, or forcing clients to release/renew may eventually help clients pick up other types of changes, but they are not required simply to make the server stop allocating the newly excluded addresses.
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