H3C Technologies H3C SecPath F1000-E - Manual (Page 225)

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Step Command Remarks
5. Configure
non-user-defined
Option 82.
• Configure the padding format for Option
82
dhcp relay information format { normal |
verbose [ node-identifier { mac |
sysname | user-defined
node-identifier } ] }
• Configure the code type for the circuit ID
sub-option
dhcp relay information circuit-id
format-type { ascii | hex }
• Configure the code type for the remote ID
sub-option
dhcp relay information remote-id
format-type { ascii | hex }
Optional.
By default,
• The padding format for
Option 82 is normal.
• The code type depends on
the padding format of
Option 82. Each field has its
own code type.
• The code type for the remote
ID sub-option is hex.
The remote ID sub-option
configuration and the circuit ID
sub-option configuration apply
to non-user-defined Option 82
only.
6. Configure user-defined
Option 82.
• Configure the padding content for the
circuit ID sub-option
dhcp relay information circuit-id string
circuit-id
• 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.
NOTE:
•
To support Option 82, perform related configuration on both the DHCP server and relay agent. See
"Configuring DHCP server " for DHCP server configuration of this kind.
• 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.
• 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 the DHCP relay agent
Task Command Remarks
Display information about DHCP server
groups correlated to a specified or all
interfaces. display dhcp relay { all | interface
interface-type interface-number } [ | { begin
| exclude | include } regular-expression ]
Available in any
view
Display Option 82 configuration
information on the DHCP relay agent.
display dhcp relay information { all |
interface interface-type interface-number }
[ | { begin | exclude | include }
regular-expression ]
Available in any
view
Display information about bindings of
DHCP relay agents.
display dhcp relay security [ ip-address |
dynamic | static ] [ | { begin | exclude |
include } regular-expression ]
Available in any
view