3Com S7902E Command Reference Manual - page 560
4-4
Parameters
None
Description
Use the
dhcp-snooping information enable
command to configure DHCP snooping to support Option
82.
Use the
undo dhcp-snooping information enable
command to disable this function.
By default, DHCP snooping does not support Option 82.
Examples
# Configure DHCP snooping to support Option 82.
[Sysname] interface gigabitethernet2/0/1
[Sysname-GigabitEthernet2/0/1] dhcp-snooping information enable
dhcp-snooping information format
Syntax
dhcp-snooping information format
{
normal
|
verbose
[
node-identifier
{
mac
|
sysname
|
user-defined node-identifier
} ] }
undo dhcp-snooping information format
[
verbose node-identifier
]
View
Ethernet port view
Default Level
2: System level
Parameters
normal
: Specifies the normal padding format.
verbose
: Specifies the verbose padding format.
node-identifier
{
mac
|
sysname
|
user-defined
node-identifier
}: Specifies access node identifier. By
default, the node MAC address is used as the node identifier.
z
mac
indicates using MAC address as the node identifier.
z
sysname
indicates using the device name of a node as the node identifier.
z
user-defined
node-identifier
indicates using a specified character string as the node identifier, in
which
node-identifier
is a string of 1 to 50 characters.
Description
Use the
dhcp-snooping information format
command to specify the padding format for Option 82.
Use the
undo dhcp-snooping information format command
to restore the default.
By default, the padding format for Option 82 is
normal
.
Note that when you use the
undo dhcp-snooping information format
command, if the
verbose
node-identifier
argument is not specified, the padding format will be restored to
normal
; if the
verbose