Learning IP Information From a DHCP Server
Learning IP Information From a DHCP ServerDescription
You can use the Dynamic Host Configuration Protocol (DHCP) to automatically configure TCP/IP characteristics on the access server and remote clients. DHCP provides dynamic assignment of IP addresses and discovery of IP configuration parameters (for example, subnet mask or default gateways). A DHCP client requests and receives this information from a DHCP server on the network.
Enabling DHCP on the access server allows it to learn some of its IP configuration information from a DHCP server. The access server does not receive its IP address from the DHCP server; you must manually configure it or use a BOOTP server.
Enabling DHCP on the access server also allows remote
By default, the DHCP setting on the access server is ENABLED. If you do not have a DHCP server on your network, disable DHCP. (See the Enabling and Disabling DHCP section in this chapter.)
BOOTP and DHCP DifferencesDHCP is an extension of BOOTP; however, using a DHCP server to obtain IP information differs from using a BOOTP server in the following ways:
Using a BOOTP Server | Using a DHCP Server |
The access server can learn its IP address from a BOOTP server (or you can configure it directly on the access server).
The access server does not learn its IP address from a DHCP server. The access server can learn the following from a DHCP server:
•Domain name
•Default gateway
•Domain Name System (DNS) servers
•Windows Internet Naming Service (WINS) servers
You configure the IP information to be learned in the BOOTP server’s database and associate it with the access server’s hardware address.
You do not configure the DHCP server with any access server or
TCP/IP Network Characteristics