H3C Technologies H3C S12500 Series Switches - Manual (Page 63)

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Enabling Option 82 handling
Step 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.
To support Option 82 requires configuring both the DHCP server and relay agent (or the switch enabled
with DHCP snooping). For information about related configurations, see "
Configuring the DHCP server "
and " Configuring the DHCP relay agent ."
Specifying the threshold for sending trap messages
Configuration prerequisites
Before performing the configuration, use the snmp-agent target-host command to specify the destination
address of the trap messages. For more information about the command, see Network Management and
Monitoring Command Reference.
Configuration procedure
A DHCP server sends trap messages to the network management server when one of the following
reaches the specified threshold:
• The ratio of successfully allocated IP addresses to received DHCP requests
• The average IP address utilization of the address pool
• The maximum IP address utilization of the address pool
Trap messages help network administrators know the latest usage information about the DHCP server.
To specify the threshold for sending trap messages:
Step Command Remarks
1. Enter system view. system-view N/A
2. Specify the threshold for
sending trap messages to the
network management server.
dhcp server threshold { allocated-ip
threshold-value | average-ip-use
threshold-value | max-ip-use threshold-value }
Optional.
Disabled by default.
Displaying and maintaining the DHCP server
Task Command Remarks
Display information about IP address
conflicts.
display dhcp server conflict { all | ip
ip-address } [ | { begin | exclude | include }
regular-expression ]
Available in any view.