Quick Reference Guide

324 DHCP Management Interface Commands
release dhcp
Use the release dhcp command in Privileged EXEC mode to force the
DHCPv4 client to release a leased address.
Syntax
release dhcp interface-id
• interface-id — Any valid VLAN interface. See Interface Naming Conventions for
interface representation.
Default Configuration
This command has no default configuration.
Command Mode
Privileged EXEC
User Guidelines
The DHCP client sends a DHCP RELEASE message telling the DHCP
server that it no longer needs the IP address, and that the IP address can be
reassigned to another client. The interface method does not change and will
still be DHCP even after issuing this command. To lease an IP address again,
issue either the renew dhcp
interface-id command below or ip address dhcp
(Interface Configuration)
command on page 481 in interface mode. If the
IPv4 address on the interface was not assigned by DHCP, then the command
fails and displays the following error message:
The release dhcp option is applicable only for routing interfaces and not for
Out-of-Band port. Use the
ip address (Out-of-Band) none command on the
Out-of-Band interface to clear a DHCP-acquired address.
Example
console#release dhcp vlan2
release dhcp debug dhcp packet
renew dhcp show dhcp lease
2CSNXXX_SWUM200.book Page 324 Tuesday, December 10, 2013 1:22 PM