Cisco Systems OL-6426-02 manual Configure Dhcp

Chapter 5 Configuring a LAN with DHCP and VLANs

Configure DHCP

•Configure VLANs

Note The procedures in this chapter assume you have already configured basic router features as well as PPPoE or PPPoA with NAT. If you have not performed these configurations tasks, see Chapter 1, “Basic Router Configuration,” Chapter 3, “Configuring PPP over Ethernet with NAT,” and Chapter 4, “Configuring PPP over ATM with NAT” as appropriate for your router. See the Cisco IOS IP Configuration Guide to assign an IP address to the ports.

Configure DHCP

Perform these steps to configure your router for DHCP operation, beginning in global configuration mode:

	Command	Purpose
Step 1
	ip domain name name	Identifies the default domain that the router uses to
		complete unqualified hostnames (names without a
	Example:	dotted-decimal domain name).
	Router(config)# ip domain name smallbiz.com
	Router(config)#
Step 2
	ip name-server server-address1	Specifies the address of one or more Domain
	[server-address2...server-address6]	Name System (DNS) servers to use for name and
		address resolution.
	Example:
	Router(config)# ip name-server 192.168.11.12
	Router(config)#
Step 3
	ip dhcp excluded-address low-address	Specifies IP addresses that the DHCP server
	[high-address]	should not assign to DHCP clients. In this
		example, we are excluding the router address.
	Example:
	Router(config)# ip dhcp excluded-address
	192.168.9.0
Step 4
	ip dhcp pool name	Creates a DHCP address pool on the router and
		enters DHCP pool configuration mode. The name
	Example:	argument can be a string or an integer.
	Router(config)# ip dhcp pool dpool1
	Router(config-dhcp)#
Step 5
	network network-number [mask prefix-length]	Defines subnet number (IP) address for the DHCP
		address pool, optionally including the mask.
	Example:
	Router(config-dhcp)# network 10.10.0.0
	255.255.255.0
	Router(config-dhcp)#

Book Title

5-2 OL-xxxxx-xx