Cisco Catalyst 4500 Series Software Configuration Guide

59-19
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 59 Configuring the Cisco IOS DHCP Server
Configuring DHCP Address Pools
Customizing DHCP Server Operation
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
Step 5
Switch(dhcp-config)# end
Exits DHCP configuration mode and returns to privileged EXEC
mode.
Step 6
Switch# show ip dhcp binding [address]
(Optional) Displays a list of all bindings created on a specific
DHCP server.
Command or Action Purpose
Step 1
Switch> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
Switch# configure terminal
Enters global configuration mode.
Step 3
Switch(config)# ip dhcp ping packets
number
(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.
Step 4
Switch(config)# ip dhcp ping timeout
milliseconds
(Optional) Specifies the duration the DHCP server waits for a
ping reply from an address pool.
Step 5
Switch(config)# ip dhcp bootp ignore
(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.
Step 6
Switch(config)# end
Exits global configuration mode and returns to privileged EXEC
mode.
Command or Action Purpose

Cisco Catalyst 4500 Series Specifications

General

Series	Catalyst 4500 Series
Category	Switch
Layer Support	Layer 2, Layer 3
Form Factor	Modular chassis
Stackable	No
Chassis Slots	3, 6, 7, 10
Power Supply Options	AC, DC
Redundancy	Power supply, Supervisor engine
Network Management	Cisco IOS Software CLI, SNMP, Cisco Prime Infrastructure
Features	Security, QoS
Port Density	Up to 384 ports per chassis
Security Features	802.1X, ACLs, DHCP Snooping, Dynamic ARP Inspection, IP Source Guard
Supervisor Engine	8-E