Client aware DHCP lease management

摘要

The management of DHCP address leased based on client properties is described. According to a method of operation, clients are managed in a wireless digital network by modifying a requested lease time for an assigned Internet Protocol (IP) address based on properties of a client requesting the lease time. The assigned IP address is released if (i) no communication activity is detected by the client for a prescribed duration or (ii) upon detecting a DHCP Release message from the client. When the DHCP server receives a renewal request, it checks if the client has generated more than a predetermined amount of traffic. If the client has generated traffic exceeding this threshold level, the lease is renewed for a longer period. If the client traffic has not met the threshold level, the lease is renewed with the short lease time.

主权项

1. A non-transitory computer readable medium comprising instructions, which, when executed by one or more hardware processors, cause a network device to:
forward, to a DHCP server, a first DHCP request message received from a client device; receive a DHCP response message from the DHCP server; rewrite the DHCP response message received from the DHCP server to include a first lease time of an Internet Protocol (IP) address and forward the rewritten DHCP response message to the client device, wherein the first lease time is determined based at least on a client property associated with the client device; forward, to the DHCP server, a DHCP renew request message received from the client device upon expiration of the first lease time; determine whether the client device has been active during the first lease time by querying a controller through which traffic of the client device flows; responsive to the client device having been active during the first lease time, forward to the client device a DHCP renew response message received from the DHCP server, wherein the DHCP renew response message has a second lease time that is longer than the first lease time; and responsive to the client device having been inactive during the first lease time, rewrite the DHCP renew response message to include a lease time equal to the first lease time and forward the rewritten DHCP renew response message to the client device.