User guide

4-12
Cisco WLAN Controller Web Interface User Guide
OL-7416-04
Chapter 4 Controller Menu Bar Selection
DHCP Scopes
DHCP Scope > Edit
Use CONTROLLER > Internal DHCP Server then click Edit to navigate to this page.
The controllers have built-in DHCP relay agents. However, when network administrators desire network
segments that do not have a separate DHCP server, the controllers also have built-in DHCP Scopes
(servers) that assign IP addresses and subnet masks to Cisco WLAN Solution clients. Typically, one
controller can have one or more DHCP Scopes that each provide a range of IP addresses. This page
allows you to edit a DHCP server Scope.
This page shows the name of the DHCP Scope you are editing.
Each DHCP Scope allows you to edit the following parameters:
• Pool Start Address - the starting IP address in the range assigned to clients. Note that this pool must
be unique for each DHCP Scope. Also note that the pool must not include the static IP addresses of
routers and other servers.
• Pool End Address - the ending IP address in the range assigned to clients. Note that this pool must
be unique for each DHCP Scope. Also note that the pool must not include the static IP addresses of
routers and other servers.
• Network - the network served by this DHCP Scope. This is the IP address used by the Management
Interface listed on the Interfaces page.
• Netmask - the subnet mask assigned to all Cisco WLAN Solution clients.
• Lease Time - how many seconds an IP address is granted to a client, from 0 through 65536.
• Default Routers - IP address of the optional router or routers connecting Cisco 4100 Series Wireless
LAN Controllers. Note that each router must include a DHCP forwarding agent. Note that this
allows a single controller to serve the clients of multiple Cisco 4100 Series Wireless LAN
Controllers.
• DNS Domain Name - optional DNS (Domain Name System) Domain Name of this DHCP Scope,
for use with one or more DNS Servers.
• DNS Servers - IP address of the optional DNS Servers. Note that each DNS Server must be able to
update a client’s DNS entry to match the IP address assigned by this DHCP Scope.
• NetBIOS Name Servers - IP address of the optional Microsoft NetBIOS (Network Basic Input
Output System) Name Servers, such as a WINS (Windows Internet Naming Service) Server.
• Status - Enable or Disable this DHCP Scope.
Command Buttons
• Back: Return to the previous window.
• Apply: Data is sent to the controller and made to take effect, but not preserved across a power cycle;
these parameters are stored temporarily in volatile RAM.