Configuring The Dhcp Relay Agent To Release An Ip Address; Configuring Option 82 - HP 6125XLG Configuration Manual

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
The system name (sysname) if padded in sub-option 1 (node identifier) of Option 82 must not
•
contain spaces. Otherwise, the DHCP relay agent drops the message.
To configure Option 82:
Step
1. Enter system view.
2. Enter interface view.
3. Enable the relay agent to handle
Option 82.
4. (Optional.) Configure the strategy
for handling DHCP requests
containing Option 82.
5. (Optional.) Configure the padding
content and code type for the
Circuit ID sub-option.
6. (Optional.) Configure the padding
content and code type for the
Remote ID sub-option.
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
dhcp relay information strategy
{ drop | keep | replace }
dhcp relay information circuit-id
{ string circuit-id | { normal |
verbose [ node-identifier { mac |
sysname | user-defined
node-identifier } ] } [ format { ascii |
hex } ] }
dhcp relay information remote-id
{ normal [ format { ascii | hex } ] |
string remote-id | sysname }
55
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.
By default, the handling
strategy is replace.
By default, the padding
format for Circuit ID
sub-option is normal, and the
code type is hex.
By default, the padding
format for the Remote ID
sub-option is normal, and the
code type is hex.
82."