Cisco CISCO876-SEC-I-K9 Configuration Guide - Page 60

Con DHCP

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Configure DHCP Chapter 5 Configuring a LAN with DHCP and VLANs When you configure a DHCP server, you must configure the server properties, policies, and DHCP options. Note Whenever you change server properties, you must reload the server with the configuration data from the Network Registrar database. VLANs The Cisco 870 series access routers support four Fast Ethernet ports on which you can configure VLANs. VLANs enable networks to be segmented and formed into logical groups of users, regardless of the user's physical location or LAN connection. Configuration Tasks Perform the following tasks to configure this network scenario: • 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. Configure DHCP Perform these steps to configure your router for DHCP operation, beginning in global configuration mode: Step 1 Command ip domain name name Example: Router(config)# ip domain name smallbiz.com Router(config)# Purpose Identifies the default domain that the router uses to complete unqualified hostnames (names without a dotted-decimal domain name). Step 2 ip name-server server-address1 [server-address2...server-address6] Example: Specifies the address of one or more Domain Name System (DNS) servers to use for name and address resolution. Router(config)# ip name-server 192.168.11.12 Router(config)# Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide 5-2 OL-5332-01

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5-2
Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide
OL-5332-01
Chapter 5
Configuring a LAN with DHCP and VLANs
Configure DHCP
When you configure a DHCP server, you must configure the server properties, policies, and DHCP
options.
Note
Whenever you change server properties, you must reload the server with the configuration data from the
Network Registrar database.
VLANs
The Cisco 870 series access routers support four Fast Ethernet ports on which you can configure
VLANs.
VLANs enable networks to be segmented and formed into logical groups of users, regardless of the
user’s physical location or LAN connection.
Configuration Tasks
Perform the following tasks to configure this network scenario:
•
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.
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
Example:
Router(config)#
ip domain name smallbiz.com
Router(config)#
Identifies the default domain that the router uses to
complete unqualified hostnames (names without a
dotted-decimal domain name).
Step 2
ip name-server
server-address1
[
server-address2...server-address6
]
Example:
Router(config)#
ip name-server 192.168.11.12
Router(config)#
Specifies the address of one or more Domain Name
System (DNS) servers to use for name and address
resolution.