CHAPTER 55
Configuring DHCP
•
Finding Feature Information, page 1265
•
Information About DHCP, page 1265
•
How to Configure DHCP Features, page 1272
•
Configuring DHCP Server Port-Based Address Allocation, page 1282
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest caveats and
feature information, see Bug Search Tool and the release notes for your platform and software release. To
find information about the features documented in this module, and to see a list of the releases in which each
feature is supported, see the feature information table at the end of this module.
Use Cisco Feature Navigator to find information about platform support and Cisco software image support.
To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not
required.
Information About DHCP
DHCP Server
The DHCP server assigns IP addresses from specified address pools on a switch or router to DHCP clients
and manages them. If the DHCP server cannot give the DHCP client the requested configuration parameters
from its database, it forwards the request to one or more secondary DHCP servers defined by the network
administrator. The switch can act as a DHCP server.
DHCP Relay Agent
A DHCP relay agent is a Layer 3 device that forwards DHCP packets between clients and servers. Relay
agents forward requests and replies between clients and servers when they are not on the same physical subnet.
Relay agent forwarding is different from the normal Layer 2 forwarding, in which IP datagrams are switched
Consolidated Platform Configuration Guide, Cisco IOS Release 15.2(4)E (Catalyst 2960-X Switches)
1265
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