Enabling Client Offline Detection; Enabling Handling Of Option 82; Configuration Prerequisites; Configuration Procedure - HP 10500 Series Configuration Manual

Step
2. Specify the maximum number of
ping packets to be sent for
conflict detection.
3. Configure the ping timeout time.

Enabling client offline detection

With this feature enabled, the DHCP server considers 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:
Step
1. Enter system view.
2. Enter interface view.
3. Enable offline detection.

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 performing this configuration, complete the following configurations:
• Configure the DHCP server:
Enable DHCP.
Configure the DHCP address pool.
Configure the relay agent or the device enabled with DHCP snooping. For more information, see
•
"Configuring the DHCP relay

Configuration procedure

To enable the DHCP server to handle Option 82:
Command
dhcp server ping packets
number
dhcp server ping timeout
milliseconds
Command
system-view
interface interface-type
interface-number
dhcp server client-detect enable
agent" and "Configuring DHCP
49
Remarks
Optional.
The default setting is one.
The value 0 disables IP address conflict
detection.
Optional.
The default setting is 500 ms.
The value 0 disables IP address conflict
detection.
Remarks
N/A
N/A
Disabled by default.
snooping."