H3C SOHO IE4300, Command Reference Manual

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Related commands
dhcp client identifier
ip address dhcp-alloc
ip address dhcp-alloc
Use ip address dhcp-alloc to configure an interface to use DHCP for IP address acquisition.
Use
undo ip address dhcp-alloc
to cancel an interface from using DHCP.
Syntax
ip address dhcp-alloc
undo ip address dhcp-alloc
Default
•
If the switch starts with initial configuration, an interface does not use DHCP for IP address
acquisition.
•
If the switch starts with factory defaults, VLAN-interface 1 obtains an IP address through DHCP.
For more information about initial configuration and factory defaults, see configuration file
management configuration in
Fundamentals Configuration Guide .
Views
Interface view
Predefined user roles
network-admin
Usage guidelines
When you execute the undo ip address dhcp-alloc command, the interface sends a
DHCP-RELEASE message to release the IP address obtained through DHCP. If the interface is
down, the message cannot be sent out. This situation can occur when a subinterface obtained an IP
address through DHCP, and the
shutdown
command is executed on its primary interface. The
subinterface will fail to send a DHCP-RELEASE message.
Examples
# Configure VLAN-interface 10 to use DHCP for IP address acquisition.
<Sysname> system-view
[Sysname] interface vlan-interface 10
[Sysname-Vlan-interface10] ip address dhcp-alloc
DHCP snooping commands
DHCP snooping works between the DHCP client and the DHCP server or between the DHCP client
and the relay agent. DHCP snooping does not work between the DHCP server and the DHCP relay
agent.
dhcp snooping binding database filename
Use
dhcp snooping binding database filename
to configure the DHCP snooping device to
back up DHCP snooping entries to a file.
Use
undo dhcp snooping binding database filename
to restore the default.