Dhcp Snooping Support For Option 82 - HP 830 Series Configuration Manual

DHCP snooping support for Option 82

Option 82 records the location information about the DHCP client so the administrator can locate the
DHCP client for security control and accounting purposes. For more information, see
DHCP relay
If DHCP snooping supports Option 82, it handles clients' requests according to Option 82, if any.
4 describes the handling strategies.
If a reply returned by the DHCP server contains Option 82, the DHCP snooping device removes the
Option 82 before forwarding the reply to the client. If the reply contains no Option 82, the DHCP
snooping device forwards it directly.
Table 4 Handling strategies of DHCP snooping
If a DHCP request
has...
Option 82
agent."
Handling
strategy
Drop
Keep
Replace
Append
Padding format The DHCP snooping device...
N/A Drops the message.
Forwards the message without changing
Random
Option 82.
Forwards the message after replacing the
normal original Option 82 with the Option 82 padded
in normal format.
Forwards the message after replacing the
verbose original Option 82 with the Option 82 padded
in verbose format.
Forwards the message after replacing the
user-defined original Option 82 with the user-defined
Option 82.
Forwards the message without changing
normal
Option 82.
Forward the message without changing Option
verbose
82.
Forwards the message after adding sub-option
9 to option 82 or adding content to sub-option
private
9 that option 82 contains.
Forwards the message without changing
standard
Option 82.
Forwards the message without changing
user-defined
Option 82.
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"Configuring the
Table