As I understand, it is responsibility of the client to send renew requests periodically. How long is this period? Can I receive this information once IP address is dynamically assigned do my interface? Does DHCP protocol provides me this information or I should ask it from the server administrator?
The validity period of the lease is however long you set it up to be on the DHCP server. Clients typically renew the lease once 50% of that time has elapsed, though actual DHCP client implementations may vary.
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