3com 3CRUS2475 Manuale Utente

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 deconfigures any IP address that was 
acquired, and sends a DHCPRELEASE message. 

Example

The following example acquires an IP address for Ethernet port g16 from 
DHCP.

The ip default-gateway Global Configuration mode command defines 
a default gateway (device). To restore the default configuration, use the 
no form of this command.

ip default-gateway ip-address

■

ip-address — Specifies the valid IP address of the currently defined 
default gateway.

No default gateway is defined.

Global Configuration mode

Console(config)# interface ethernet g16

Console(config-if)# ip address dhcp