Administrator Guide

ip address dhcp
Acquire an IP address dynamically on an interface from the DHCP server.
Syntax
ip address dhcp [relay | vendor-class-identifier]
To disable DHCP Client on an interface, use the no ip address dhcp command.
Command Modes INTERFACE
Supported Modes All Modes
Default Enabled
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
8.3.17.0 Supported on the M I/O Aggregator.
Usage
Information
In the I/O Aggregator, the DHCP client is enabled only on the default VLAN and management interface
0/0. Use the ip address command to assign a static IP address that overwrites the dynamically
assigned IP address.
release dhcp interface
Release the dynamically-acquired IP address on an Ethernet interface while retaining the DHCP client configuration on the
interface.
Syntax
release dhcp interface type slot/port
Parameters
interface type
slot/port
● For the management interface on the stack-unit, enter the keyword
management ethernet followed by slot/port information. The slot and port
range is 0.
● For a VLAN, enter the keyword vlan followed by a number from 1 to 4094.
Command Modes EXEC Privilege
Supported Modes All Modes
Default None
Command
History
Version Description
9.4(0.0) Supported on the FN I/O Aggregator.
9.2(0.0) Supported on the M I/O Aggregator.
Usage
Information
When you enter the release dhcp command, although the IP address that was dynamically-acquired
from a DHCP server is released from an interface, the ability to acquire a new DHCP server-assigned
address remains in the running configuration for the interface. To acquire a new IP address, enter either
the renew dhcp command at the EXEC privilege level or the ip address dhcp command at the
interface configuration level.
renew dhcp interface
Re-acquire a dynamic IP address on an Ethernet interface enabled as a DHCP client.
Syntax
renew dhcp interface type slot/port}
116 Dynamic Host Configuration Protocol