Cisco Catalyst 4500 Series Software Configuration Guide

CHAPTER
18-1
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
18
Configuring IP Unnumbered Interface
This chapter discusses the IP Unnumbered Interface feature, which allows you to enable IP processing
on an interface without assigning an explicit IP address.
This chapter contains these sections:
• About IP Unnumbered Interface Support, page 18-1
• IP Unnumbered Configuration Guidelines and Restrictions, page 18-3
• Configuring IP Unnumbered Interface Support with DHCP Server, page 18-4
• Configuring IP Unnumbered Interface Support with Connected Host Polling, page 18-6
• Displaying IP Unnumbered Interface Settings, page 18-7
• Troubleshooting IP Unnumbered Interface, page 18-8
• Related Documents, page 18-8
Note For complete syntax and usage information for the switch commands used in this chapter, see the
Cisco IOS Command Reference Guides for the Catalyst 4500 Series Switch.
If a command is not in the Cisco Catalyst 4500 Series Switch Command Reference , you can locate it in
the Cisco IOS Master Command List, All Releases.
About IP Unnumbered Interface Support
Before you configure VLANs and LAN interfaces with IP unnumbered interfaces, you should
understand the following concepts:
• IP Unnumbered Interface Support with DHCP Server and Relay Agent, page 18-2
• DHCP Option 82, page 18-2
• IP Unnumbered Interface with Connected Host Polling, page 18-3

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