H3C Technologies H3C S7500E Series Switches - Manual (Page 59)

5-16
the IP addresses once again until the specified number of ping packets are sent. If still no response is
received, the server will assign the IP address to the requesting client (The DHCP client probes the IP
address by sending gratuitous ARP packets).
Follow these steps to configure IP address conflict detection:
To do… Use the command… Remarks
Enter system view system-view —
Specify the number of ping
packets
dhcp server ping packets
number
Optional
One ping packet by default.
The value 0 indicates that no ping
operation is performed.
Configure a timeout waiting for
ping responses
dhcp server ping timeout
milliseconds
Optional
500 ms by default.
The value 0 indicates that no ping
operation is performed.
Configuring the Handling Mode for Option 82
When the DHCP server receives a message with Option 82, if the server is configured to handle
Option 82, it will return a response message carrying Option 82 to assign an IP address to the
requesting client.
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:
z Enable DHCP
z Configure the DHCP address pool
Configuring the handling mode for Option 82
Follow these steps to enable the DHCP server to handle Option 82:
To do… Use the command… Remarks
Enter system view system-view —
Enable the server to handle Option
82
dhcp server relay information
enable
Optional
Enabled by default.