Customizing Dhcp Server Operation - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 59 Configuring the Cisco IOS DHCP Server
Command or Action
Step 5
Switch(dhcp-config)# end
Switch# show ip dhcp binding [address]
Step 6

Customizing DHCP Server Operation

Command or Action
Step 1
Switch> enable
Step 2
Switch# configure terminal
Step 3
Switch(config)# ip dhcp ping packets
number
Step 4
Switch(config)# ip dhcp ping timeout
milliseconds
Step 5
Switch(config)# ip dhcp bootp ignore
Switch(config)# end
Step 6
Configuring a Remote Device to Import DHCP Server Options from a Central
DHCP Server
The Cisco DHCP server can dynamically configure options such as the Domain Name System (DNS)
and Windows Internet Name Service (WINS) addresses to respond to DHCP requests from local clients
behind the customer premises equipment (CPE). Earlier, network administrators configured the Cisco
DHCP server on each device manually. Now, the Cisco DHCP server is enhanced to allow configuration
information to be updated automatically. Network administrators can configure one or more centralized
DHCP servers to update specific DHCP options within the DHCP pools. The remote servers can request
or "import" these option parameters from centralized servers.
This section contains the following tasks:
•
•
Configuring the Central DHCP Server to Update DHCP Options, page 59-20
Configuring a Remote Device to Import DHCP Server Options from a Central DHCP Server,
page 59-19
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Purpose
Exits DHCP configuration mode and returns to privileged EXEC
mode.
(Optional) Displays a list of all bindings created on a specific
DHCP server.
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
•
Enters global configuration mode.
(Optional) Specifies the number of ping packets the DHCP server
sends to a pool address before assigning the address to a
requesting client.
The default is two packets. Setting the number argument to a
•
value of 0 disables the DHCP server ping operation.
(Optional) Specifies the duration the DHCP server waits for a
ping reply from an address pool.
(Optional) Allows the DHCP server to selectively ignore and not
reply to received BOOTP requests.
The ip dhcp bootp ignore command applies to all DHCP
•
pools configured on the device. BOOTP requests cannot be
selectively ignored on a per-DHCP pool basis.
Exits global configuration mode and returns to privileged EXEC
mode.
Configuring DHCP Address Pools
59-19