R3102-R3103-HP 6600/HSR6600 Routers Layer 3 - IP Services Command Reference

Syntax

dhcp select relay

undo dhcp select relay

Views

Interface view

Default command level

2: System level

Usage guidelines

After DHCP is enabled, the DHCP server is enabled on an interface by default. 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 are deleted. However, these ARP entries might conflict

with new ARP entries generated on the DHCP relay agent. To avoid this, delete the existing IP address

leases when changing the interface working mode to DHCP relay agent.

Examples

# Enable the DHCP relay agent on the interface GigabitEthernet 3/1/1.

<Sysname> system-view

[Sysname] interface gigabitethernet 3/1/1

[Sysname-GigabitEthernet3/1/1] dhcp select relay

dhcp update arp (for DHCP relay agent)

Use dhcp update arp to configure the DHCP relay agent to support authorized ARP.

Use undo dhcp update arp to restore the default.

Syntax

dhcp update arp

undo dhcp update arp

Default

The DHCP relay agent does not support authorized ARP.