The dhcpagent daemon caches the current configuration information in /var/dhcp/interface.dhc when the interface's IP address lease is dropped. For example, if DHCP is used on the qe0 interface, the dhcpagent daemon caches the configuration information in /var/dhcp/qe0.dhc. The next time DHCP starts on the interface, the DHCP client requests to use the cached configuration if the lease has not expired. If the DHCP server denies the request, the client begins the standard process for DHCP lease negotiation.
ISC DHCP only: List leases for DHCPv4 and DHCPv6 servers.