H3C Technologies H3C S7500E Series Switches - Manual (Page 74)

6-9
To do… Use the command… Remarks
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.
Configure the
padding content for
the circuit ID
sub-option
dhcp relay information
circuit-id string circuit-id
Optional
By default, the padding content
depends on the padding format
of Option 82.
Configure
user-defined
Option 82 Configure the
padding content for
the remote ID
sub-option
dhcp relay information
remote-id string { remote-id |
sysname }
Optional
By default, the padding content
depends on the padding format
of Option 82.
z To support Option 82, it is required to perform related configuration on both the DHCP server and
relay agent. Refer to Configuring the Handling Mode for Option 82 for DHCP server configuration
of this kind.
z If the handling strategy of the DHCP relay agent is configured as replace, you need to configure a
padding format for Option 82. If the handling strategy is keep or drop, you need not configure any
padding format.
z If sub-option 1 (node identifier) of Option 82 is padded with the device name (sysname) of a node,
the device name must contain no spaces. Otherwise, the DHCP relay agent will drop the
message.
Displaying and Maintaining DHCP Relay Agent Configuration
To do… Use the command… Remarks
Display information about DHCP server
groups correlated to a specified or all
interfaces
display dhcp relay { all | interface
interface-type interface-number }
Available in any view
Display Option 82 configuration
information on the DHCP relay agent
display dhcp relay information { all
| interface interface-type
interface-number }
Available in any view