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TRENDnet User’s Guide
TL2-FG142
103
5.5.2 Port Security - Switch
This page shows the Port Security status. Port Security is a module with no direct
configuration. Configuration comes indirectly from other modules - the user modules.
When a user module has enabled port security on a port, the port is set-up for software-
based learning. In this mode, frames from unknown MAC addresses are passed on to
the port security module, which in turn asks all user modules whether to allow this new
MAC address to forward or block it. For a MAC address to be set in the forwarding state,
all enabled user modules must unanimously agree on allowing the MAC address to
forward. If only one chooses to block it, it will be blocked until that user module decides
otherwise.
The status page is divided into two sections - one with a legend of user modules and one
with the actual port status.
User Module Legend
The legend shows all user modules that may request Port Security services.
Items
Description
User Module
Name
The full name of a module that may request Port Security services.
Abbr
A one-letter abbreviation of the user module. This is used in the Users
column in the port status table.
Port Status
The table has one row for each port on the selected switch in the stack and a number of
columns, which are:
Items
Description
Port
The port number for which the status applies. Click the port number to
see the status for this particular port.
Users
Each of the user modules has a column that shows whether that module
has enabled Port Security or not. A '-' means that the corresponding user
module is not enabled, whereas a letter indicates that the user module
abbreviated by that letter (see Abbr) has enabled port security.
State
Shows the current state of the port. It can take one of four values:
Disabled: No user modules are currently using the Port Security service.
Ready: The Port Security service is in use by at least one user module,
and is awaiting frames from unknown MAC addresses to arrive.
Limit Reached: The Port Security service is enabled by at least the Limit
Control user module, and that module has indicated that the limit is
reached and no more MAC addresses should be taken in.
Shutdown: The Port Security service is enabled by at least the Limit
Control user module, and that module has indicated that the limit is
exceeded. No MAC addresses can be learned on the port until it is
administratively re-opened on the Limit Control configuration Web-
page.
MAC Count
(Current,
Limit)
The two columns indicate the number of currently learned MAC
addresses (forwarding as well as blocked) and the maximum number of
MAC addresses that can be learned on the port, respectively.
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