Configuring Network Protocols Managing DHCP 1 2 DHCP Overview • Is a protocol that allows client computers to automatically receive an IP address and TCP/IP settings from a Server • Reduces the amount[.]
Managing DHCP DHCP Overview • Is a protocol that allows client computers to automatically receive an IP address and TCP/IP settings from a Server • Reduces the amount of time you spend configuring computers on your network • Is the default configuration for clients • The ipconfig /all command will indicate whether the configuration came from a DHCP server computer DHCP Overview (continued) DHCP Overview (continued) Leasing an IP Address • An IP address is leased during the boot process • The overall process is composed of four broadcast packets: • • • • DHCPDISCOVER DHCPOFFER DHCPREQUEST DHCPACK Leasing an IP Address (continued) • Any DHCP server that receives the DHCPDISCOVER packet responds with a DHCPOFFER packet • The DHCP client responds to the DHCPOFFER packet it receives with a DHCPREQUEST packet • A DHCPACK packet indicates confirmation that the client can use the lease • Once DHCPACK is received, the client can start using the IP address and options in the lease Leasing an IP Address (continued) Renewing an IP Address • The IP address can either be permanent or timed • A permanent address is never reused for another client • Timed leases expire after a certain amount of time • Windows clients attempt to renew their lease after 50% of the lease time has expired If the renewal process fails, it attempts again after 87.5% of the lease time has expired • Renewing the lease involves the client sending a DHCP Request packet to DHCP Server Renewing an IP Address (continued) More on the Renewal Process… • DHCP Client, at startup, attempts to reach the DHCP Server Server Available: • If the server is available and the lease has not yet expired, the client retains the IP address • If the server is available and the lease has expired, the client attempts to renew the lease 10 ... address and TCP/IP settings from a Server • Reduces the amount of time you spend configuring computers on your network • Is the default configuration for clients • The ipconfig /all command will... addresses 15 Configuring DHCP Scopes (continued) • Lease duration defines how long client computers are allowed to use an IP address • Default lease duration varies based on the network type... authorize a server • A server that is a member of a workgroup does not need to be authorized 14 Configuring DHCP Scopes • Scope defines a range of IP addresses • Each scope is configured with: