Enabling Client Offline Detection On The Dhcp Server; Enabling Dhcp Logging On The Dhcp Server - HPE FlexNetwork 10500 Series Configuration Manual

•
The client's VPN information stored in authentication modules.
•
The VPN information of the DHCP server's interface that receives DHCP packets from the
client.
The VPN information from authentication modules takes priority over the VPN information of the
receiving interface.
To apply a DHCP address pool to a VPN instance:
Step
1. Enter system view.
2. Create a DHCP address pool
and enter its view.
3. Apply the address pool to a
VPN instance.
Enabling client offline detection on the DHCP
server
The client offline detection feature reclaims an assigned IP address and deletes the binding entry
when the ARP entry for the IP address ages out. The feature does not function if an ARP entry is
manually deleted.
To enable client offline detection on the DHCP server:
Step
1. Enter system view.
2. Enter interface view.
3. Enable client offline detection.

Enabling DHCP logging on the DHCP server

The DHCP logging feature enables the DHCP server to generate DHCP logs and send them to the
information center. For information about the log destination and output rule configuration in the
information center, see Network Management and Monitoring Configuration Guide.
As a best practice, disable this feature if the log generation affects the device performance or
reduces the address allocation efficiency. For example, this situation might occur when a large
number of clients frequently come online or go offline.
To enable DHCP logging on the DHCP server:
Step
1. Enter system view.
2. Enable DHCP logging.
Command
system-view
dhcp server ip-pool pool-name
vpn-instance vpn-instance-name
Command
system-view
interface interface-type
interface-number
dhcp client-detect
Command
system-view
dhcp log enable
55
Remarks
N/A
By default, no DHCP address
pool exists.
By default, the address pool is
not applied to any VPN
instance.
Remarks
N/A
N/A
By default, client offline
detection is disabled on the
DHCP server.
Remarks
N/A
By default, DHCP logging is
disabled.