Dhcp Relay Client-Information Refresh Enable - HP 6125XLG Command Reference Manual

Examples
# Set the refresh interval to 100 seconds.
<Sysname> system-view
[Sysname] dhcp relay client-information refresh interval 100
Related commands
dhcp relay client-information record
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dhcp relay client-information refresh enable

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dhcp relay client-information refresh enable
Use dhcp relay client-information refresh enable to enable the relay agent to periodically refresh
dynamic relay entries.
Use undo dhcp relay client-information refresh enable to disable the relay agent to periodically refresh
dynamic relay entries.
Syntax
dhcp relay client-information refresh enable
undo dhcp relay client-information refresh enable
Default
The DHCP relay agent periodically refreshes relay entries.
Views
System view
Predefined user roles
network-admin
Usage guidelines
A DHCP client unicasts a DHCP-RELEASE message to the DHCP server to release its IP address. The
DHCP relay agent conveys the message to the DHCP server and does not remove the IP-to-MAC entry of
the client.
With this feature, the DHCP relay agent uses the IP address of a client and the MAC address of the DHCP
relay interface to periodically send a DHCP-REQUEST message to the DHCP server.
If the server returns a DHCP-ACK message or does not return any message within a specific interval,
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the DHCP relay agent removes the entry and sends a DHCP-RELEASE message to the DHCP server
to release the IP address.
If the server returns a DHCP-NAK message, the relay agent keeps the entry.
•
With this feature disabled, the DHCP relay agent does not remove relay entries automatically. After a
DHCP client releases its IP address, you must use the reset dhcp relay client-information on the relay
agent to remove the corresponding relay entry.
Examples
# Disable periodic refresh of relay entries.
<Sysname> system-view
[Sysname] undo dhcp relay client-information refresh enable
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