Configuring The Dhcp Relay Agent To Release An Ip Address; Configuring Option 82 - HP FlexNetwork MSR2003 Configuration Manual

Step
2. Set the aging time for MAC
address check entries.
3. Enter the interface view.
4. Enable MAC address check.
Configuring the DHCP relay agent to release an
IP address
Configure the relay agent to release the IP address for a relay entry. The relay agent sends a
DHCP-RELEASE message to the server and meanwhile deletes the relay entry. Upon receiving the
DHCP-RELEASE message, the DHCP server releases the IP address.
To configure the DHCP relay agent to release an IP address:
Step
1. Enter system view.
2. Configure the DHCP relay
agent to release an IP
address.

Configuring Option 82

Follow these guidelines when you configure Option 82:
•
To support Option 82, you must perform related configuration on both the DHCP server and
relay agent. For DHCP server Option 82 configuration, see
•
If the handling strategy is replace, configure a padding mode and padding format for Option 82.
If the handling strategy is keep or drop, you do not need to configure any padding mode or
padding format for Option 82. The settings do not take effect even if you configure them.
•
The device name (sysname) must not include spaces if it is configured as the padding content
for sub-option 1. Otherwise, the DHCP relay agent will fail to add or replace Option 82.
To configure Option 82:
Step
1. Enter system view.
2. Enter interface view.
3. Enable the relay agent to handle
Option 82.
Command
dhcp relay check mac-address
aging-time time
interface interface-type
interface-number
dhcp relay check mac-address
Command
system-view
dhcp relay release ip client-ip
[ vpn-instance
vpn-instance-name ]
Command
system-view
interface interface-type
interface-number
dhcp relay information enable
71
Remarks
The default aging time is 30
seconds.
This command takes effect
only after you execute the
dhcp relay check
mac-address command.
N/A
By default, MAC address
check is disabled.
Remarks
N/A
This command can release only
the IP addresses in the recorded
relay entries.
"Enabling handling of Option
Remarks
N/A
N/A
By default, handling of
Option 82 is disabled.
82."