Why is the initial DHCP lease only one hour when DHCP failover is configured?
A. When a DHCP client obtains the lease for the first time, the lease is for only one hour, even though the lease time in the policy is much longer. This happens only in scenarios where DHCP failover is used. In the failover scenario, the maximum client lead time (MCLT) is configured so that there is enough time for the backup server to synchronize with the main server. The recommended MCLT is one hour. This is needed only for new clients that are granted a lease for the first time, and is not applicable for lease renewals. After the initial one-hour lease is renewed, the client gets the lease specified in the lease policy. In CNR, customers can modify the MCLT to a lower or a higher value.
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