Cisco Systems SPS2024, SPS208G, SPS224G4 , host-name

IP Address Commands

ip address dhcp

SPS208G/SPS224G4/SPS2024 Command Line Interface Reference Guide 210

Command Mode

Interface Configuration (VLAN) mode

User Guidelines

This command is only functional if the device is in Switch mode.

The ip address dhcp command allows any interface to dynamically learn its IP

address by using the DHCP protocol.

Some DHCP servers require that the DHCPDISCOVER message have a specific

host name. The ip address dhcp hostname

host-name

command is most typically

used when the host name is provided by the system administrator.

If the device is configured to obtain its IP address from a DHCP server, it sends a

DHCPDISCOVER message to provide information about itself to the DHCP server

on the network.

If the ip address dhcp command is used with or without the optional keyword, the

DHCP option 12 field (host name option) is included in the DISCOVER message. By

default, the specified DHCP host name is the globally configured host name of the

device. However, the ip address dhcp hostname

host-name

command can be

used to place a different host name in the DHCP option 12 field.

The no ip address dhcp command de-configures any IP address acquired, and

sends a DHCPRELEASE message.

Example

The following example acquires an IP address for Ethernet port e16 from DHCP.

Console(config)# interface vlan 1

Console(config-if)# ip address dhcp