Enabling Client Offline Detection; Enabling Handling Of Option 82 - HP A7500 Series Configuration Manual

To do...
Enter system view
Specify the number of ping
packets
Configure a timeout waiting for
ping responses

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.
To enable offline detection:
To do...
Enter system view
Enter interface view
Enable offline detection
NOTE:
Removing an ARP entry manually does not remove the corresponding client's IP-to-MAC binding.

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 will assign an IP address to the client without adding
Option 82 in the response message.
Configuration prerequisites
Before performing this configuration, complete the following configuration on the DHCP server:
• Enable DHCP
Configure the DHCP address pool
•
Enable Option 82 handling
Follow these steps to enable the DHCP server to handle Option 82:
To do...
Enter system view
Use the command...
system-view
dhcp server ping packets
number
dhcp server ping timeout
milliseconds
Use the command...
system-view
interface interface-type
interface-number
dhcp server client-detect enable
Use the command...
system-view
48
Remarks
—
Optional
One ping packet by default.
The value 0 indicates that no ping
operation is performed.
Optional
500 ms by default.
The value 0 indicates that no ping
operation is performed.
Remarks
—
—
Required
Disabled by default.
Remarks
—