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TRENDnet User's Guide
Snooping.
The Switch does not discard ARP packets on trusted ports for any reasons.
The Switch discards ARP packets on un-trusted ports if the sender's
information in the ARP packets does not match any of the current bindings.
Normally, the trusted ports are the uplink port and the untrusted ports are
connected to subscribers.
Configuration:
Users can enable/disable the ARP Inspection on the Switch. Users also can enable/disable
the ARP Inspection on a specific VLAN. If the ARP Inspection on the Switch is disabled, the
ARP Inspection is disabled on all VLANs even some of the VLAN ARP Inspection are
enabled.
Default Settings
The ARP Inspection on the Switch is disabled.
The age time for the MAC filter is 5 minutes.
ARP Inspection is enabled in VLAN(s): None.
Port
Trusted
Port
----
-------
----
-------
1
no
2
no
3
no
4
no
5
no
6
no
7
no
8
no
9
no
10
no
11
no
12
no
Notices
There are a global state and per VLAN states.
When the global state is disabled, the ARP Inspection on the Switch is disabled even
per VLAN states are enabled.
When the global state is enabled, user must enable per VLAN states to enable the
ARP Inspection on the specific VLAN.
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Trusted
CLI Configuration
Node
Command
enable
show arp-inspection
configure
arp-inspection
(disable | enable)
configure
arp-inspection vlan
VLANID
configure
no arp-inspection
vlan VLANID
interface
arp-inspection trust
interface
no arp-inspection
trust
Example:
TI-PG1284I#configure terminal
TI-PG1284I(config)#arp-inspection enable
TI-PG1284I(config)#arp-inspection vlan 1
TI-PG1284I(config)#interface 1/0/1
TI-PG1284I(config-if)#arp-inspection trust
TI-PG1284i
Description
This command displays the current ARP
Inspection configurations.
This
command
disables/enables
Inspection function on the switch.
This command enables the ARP Inspection
function on a VLAN or range of VLANs.
This command disables the ARP Inspection
function on a VLAN or range of VLANs.
This command configures the trust port for the
specific port.
This command configures the un-trust port for
the specific port.
the
ARP
141
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