D-Link DGS-6600-48T Configuration Guide - Page 485

Volume 9 - Network Application Chapter Overview three ways: 1. Assign IP addresses automatically. The DHCP server assigns permanent IP addresses to the clients; 2. Assign IP addresses dynamically. The DHCP server assigns IP addresses that will expire after a period of time to the clients; 3. Configure IP addresses manually. Network administrators can specify IP addresses and send specified IP addresses to the clients through the DHCP. Among the above mentioned three methods, only dynamic assignment allows reuse of the IP address that the client does not need any more. Architecture CLI command Lease database IP conflict checker State machine per lease Configuration database Get excluded IP address Get conflict IP address Tx ( OFFER/ACK/NAK ) Rx ( DISCOVER/REQUEST/INFORM/DECLINE ) DHCP Socket Conflict table Rx ICMP echo reply ICMP Socket DHCP packet ICMP packet Lease database The Lease database is used to store the allocations of IP address. It maintains the lease time and state for each entry. IP conflict checker The IP conflict checker checks if the ready-to-assign IP address is already occupied by other client or reserved by user configuration. Conflict table The Conflict table records the IP address detected and already used by other host via ICMP echo request/reply. Operation concept Configuring the binding address pool Users can configure the address binding rules, within the address pool, to decide upon which criteria the IP addressed will be offered. The DGS-6600, provides 8 kinds of commands to configure these binding rules, which are listed below: • based on hardware mac address DGS-6600 Configuration Guide 485