H3C Technologies H3C S5120 Series Switches - Manual (Page 247)

1-7
Follow these steps to configure the DHCP relay agent in system view to send a DHCP-RELEASE
request:
To do… Use the command… Remarks
Enter system view system-view —
Configure the DHCP relay agent to send a
DHCP-RELEASE request
dhcp relay release ip client-ip Required
Configuring the DHCP Relay Agent to Support Option 82
Prerequisites
You need to complete the following tasks before configuring the DHCP relay agent to support Option 82.
z Enabling DHCP
z Enabling the DHCP relay agent on the specified interface
z Correlating a DHCP server group with relay agent interfaces
Configuring the DHCP relay agent to support Option 82
Follow these steps to configure the DHCP relay agent to support Option 82:
To do… Use the command… Remarks
Enter system view system-view —
Enter interface view
interface interface-type
interface-number
—
Enable the relay agent to support
Option 82 dhcp relay information
enable Required
Disabled by default.
Configure the handling strategy for
requesting messages containing
Option 82 dhcp relay information
strategy { drop | keep |
replace }
Optional
replace by default.
Configure the
padding format for
Option 82
dhcp relay information
format { normal | verbose
[ node-identifier { mac |
sysname | user-defined
node-identifier } ] }
Optional
normal by default.
Configure the
code type for the
circuit ID
sub-option
dhcp relay information
circuit-id format-type
{ ascii | hex }
Optional
By default, the code type
depends on the padding
format of Option 82. Each
field has its own code type.
The code type configuration
applies to non-user-defined
Option 82 only.
Configure
non-user-defined
Option 82
Configure the
code type for the
remote ID
sub-option
dhcp relay information
remote-id format-type
{ ascii | hex }
Optional
By default, the code type is
hex.
This code type configuration
applies to non-user-defined
Option 82 only.