620
G8332 Command Reference for ENOS 8.4
DHCP Snooping
DHCP
Snooping
provides
security
by
filtering
untrusted
DHCP
packets
and
by
maintaining
a
binding
table
of
trusted
interfaces.
Table 347.
DHCP
Snooping
Options
Command Syntax and Usage
[no]
ip
dhcp
snooping
Enables
or
disables
DHCP
Snooping.
Command
mode
:
Global
configuration
ip
dhcp
snooping
binding
<MAC
address>
vlan
<VLAN
ID
(1
‐
4094)>
<IP
address>
port
<port
alias
or
number>
expiry
<1
‐
4294967295>
Adds
a
manual
entry
to
the
binding
table.
Command
mode
:
Global
configuration
no
ip
dhcp
snooping
binding
{
<MAC
address>
|all
[interface
port
<port
alias
or
number>
|vlan
<VLAN
ID
(1
‐
4094)>
]}
Removes
an
entry
from
the
binding
table.
Command
mode
:
Global
configuration
[no]
ip
dhcp
snooping
information
option
insert
Enables
or
disables
option
82
support
for
DHCP
Snooping.
When
enabled,
DHCP
Snooping
performs
the
following
functions:
if
a
DHCP
packet
from
a
client
contains
option
82
information,
the
information
is
retained.
when
DHCP
Snooping
forwards
a
DHCP
packet
from
a
client,
option
82
information
is
added
to
the
packet.
when
DHCP
snooping
forward
a
DHCP
packet
from
a
server,
option
82
information
is
removed
from
the
packet.
Command
mode
:
Global
configuration
[no]
ip
dhcp
snooping
vlan
<VLAN
ID
(1
‐
4094)>
Adds
or
removes
the
selected
VLAN
to
DHCP
Snooping.
Member
ports
participate
in
DHCP
Snooping.
Command
mode
:
Global
configuration
show
ip
dhcp
snooping
Displays
the
current
DHCP
Snooping
parameters.
Command
mode
:
All
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