ToughNet NAT Router User's Manual
TN-5916 Series Features and Functions
3-15
Port Mirror
The
Port Mirror
function can be used to monitor data being transmitted through a specific port. This is done
by setting up another port (the mirror port) to receive the same data being transmitted from, or both to and
from, the port under observation. Using a mirror port allows the network administrator to
sniff
the observed
port to keep tabs on network activity.
Port Mirroring Settings
Setting
Description
Monitored Port
Select the number of the ports whose network activity will be monitored. Multiple port
selection is acceptable.
Watch Direction
Select one of the following two watch direction options:
•
Input data stream:
Select this option to monitor only those data packets coming into the Moxa
ToughNet NAT Router’s port.
•
Output data stream:
Select this option to monitor only those data packets being sent out through the
Moxa ToughNet NAT Router’s port.
•
Bi-directional:
Select this option to monitor data packets both coming into, and being sent out
through, the Moxa ToughNet NAT Router’s port.
Mirror Port
Select the number of the port that will be used to monitor the activity of the monitored
port.
Using Virtual LAN
Setting up Virtual LANs (VLANs) on your Moxa ToughNet NAT Router increases the efficiency of your network
by dividing the LAN into logical segments, as opposed to physical segments. In general, VLANs are easier to
manage.
The VLAN Concept
What is a VLAN?
A VLAN is a group of devices that can be located anywhere on a network, but which communicate as if they are
on the same physical segment. With VLANs, you can segment your network without being restricted by physical
connections—a limitation of traditional network design. With VLANs you can segment your network into:
•
Departmental groups
—you could have one VLAN for the marketing department, another for the finance
department, and another for the product development department.
•
Hierarchical groups
—you could have one VLAN for directors, another for managers, and another for
general staff.
•
Usage groups
—you could have one VLAN for email users and another for multimedia users.
