Dhcp Select Relay; Dhcp Update Arp - H3C MSR 20-20 Command Reference Manual

736 C 52: DHCP R
HAPTER

dhcp select relay

Syntax
View
Parameter
Description
Example

dhcp update arp

Syntax
View
Parameter
Description
A C C
ELAY GENT ONFIGURATION
dhcp select relay
undo dhcp select relay
Interface view
None
Use the
dhcp select relay
interface, specified or all interfaces. Upon receiving requests from an enabled
interface, the relay agent will forward these requests to outside DHCP servers for
IP address allocation.
Use the undo dhcp select relay
After DHCP is enabled, the DHCP server is enabled on an interface by default. That
is, upon receiving a client's request from the interface, the DHCP server allocates
an IP address from the DHCP address pool to the client.
When the working mode of the interface is changed from DHCP server to DHCP
relay agent, neither the IP address leases nor the authorized ARP entries will be
deleted. However, these ARP entries may conflict with the new static entries
generated on the DHCP relay agent; therefore, you are recommended to delete
the existing IP address leases when changing the interface working mode to DHCP
relay agent.
# Enable the DHCP relay agent on the interface Ethernet1/0.
<Sysname> system-view
[Sysname] interface ethernet 1/0
[Sysname-Ethernet1/0] dhcp select relay
dhcp update arp
undo dhcp update arp
Interface view
None
Use the
dhcp update arp
support authorized ARP.
Use the undo dhcp update arp
By default, the DHCP relay agent does not support authorized ARP.
OMMANDS
command to enable the relay agent on the current
command to restore the default on interface(s).
command to configure the DHCP relay agent to
command to restore the default.