R3303-HP HSR6800 Routers Layer 3 - IP Services Configuration Guide

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Ste
p
Command Remarks
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable the DHCP server to work
with authorized ARP.
dhcp update arp Not enabled by default.
4. Enable authorized ARP.
arp authorized enable Disabled by default.
Enabling client offline detection
With this feature enabled, the DHCP server considers that a DHCP client goes offline when the ARP entry
for the client ages out. In addition, it removes the client's IP-to-MAC binding entry and releases the IP
address of the client. Removing an ARP entry manually does not remove the corresponding client's
IP-to-MAC binding.
To enable offline detection:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable offline detection.
dhcp server client-detect enable Disabled by default.
Enabling handling of Option 82
With Option 82 handling enabled, when the DHCP server receives a request with Option 82, it adds
Option 82 into the response.
If the server is configured to ignore Option 82, it assigns an IP address to the client without adding
Option 82 in the response message.
Configuration prerequisites
Before you perform this configuration, complete the following configuration on the DHCP server:
1. Enable DHCP.
2. Configure the DHCP address pool.
Configuration procedure
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable the server to handle
Option 82.
dhcp server relay information
enable
Optional.
Enabled by default.