F3726, F3211, F3174, R5135, R3816-HP Firewalls and UTM Devices Network Management Configuration Guide-6PW100

180
To configure IP address conflict detection:
Ste
p
Command Remarks
384. Enter system view.
system-view N/A
385. Specify the maximum
number of ping packets to
be sent for conflict
detection.
dhcp server ping
packets number
Optional.
The default setting is one.
The value 0 disables IP address conflict detection.
386. Configure the ping timeout
time.
dhcp server ping
timeout
milliseconds
Optional.
The default setting is 500 ms.
The value 0 disables IP address conflict detection.
503BEnabling 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
387. Enter system view.
system-view N/A
388. Enter interface view. interface interface-type interface-number N/A
389. Enable offline detection.
dhcp server client-detect enable Disabled by default.
504BEnabling 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.
1222BConfiguration prerequisites
Before you perform this configuration, complete the following configurations on the DHCP server:
1. Enable DHCP.
2. Configure the DHCP address pool.
1223BEnabling Option 82 handling
To enable the DHCP server to handle Option 82:
Ste
p
Command Remarks
390. Enter system view.
system-view N/A
391. Enable the server to handle
Option 82.
dhcp server relay information
enable
Optional.
Enabled by default.