736CHAPTER 52: DHCP RELAY AGENT CONFIGURATION COMMANDS

dhcp select relay

Syntax

dhcp select relay

 

undo dhcp select relay

View

Interface view

Parameter

None

Description

Use the dhcp select relay command to enable the relay agent on the current

 

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 command to restore the default on interface(s).

 

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.

Example

# 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

Syntax

dhcp update arp

 

undo dhcp update arp

View

Interface view

Parameter

None

Description

Use the dhcp update arp command to configure the DHCP relay agent to

 

support authorized ARP.

 

Use the undo dhcp update arp command to restore the default.

 

By default, the DHCP relay agent does not support authorized ARP.

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3Com MSR 30, MSR 50 manual Dhcp select relay, Undo dhcp select relay, Dhcp update arp