AT-8024 and AT-8024GB Installation Guide
35
You can also use port trunks to increase the bandwidth between
switches. The example in Figure 18 shows a port trunk of four data links
between two AT-8024 Fast Ethernet Switches.
Figure 18 Port Trunk Example 2
Port Security
The AT-8024 and AT-8024GB Fast Ethernet Switches have three levels of
port security: Limited, Secure, and Lock All Ports. You can use the port
security levels to enhance the security to your network. The security
levels are briefly described below. For further information and
instructions on activating a security level, refer to the AT-S39
Management Software User’s Guide.
Limited
You use this security level to manually specify the maximum number of
dynamic MAC addresses a port on the switch can learn. Once a port has
learned its maximum limit of MAC addresses, it will discard any frames
that it receives with a source MAC address not already learned and
stored in the MAC address table.
This security level can prevent unauthorized individuals from
connecting to your network and gaining access to network resources.
For example, if an AT-8024 port is connected to an Ethernet hub with
four workstations attached, you can configure the switch port to learn
only four MAC addresses. Once those addresses are learned, any one
else attempting to connect to the network through the Ethernet hub
would be denied access.
Secure
This security level forwards frames based solely on static MAC addresses.
When this security level is activated, the switch deletes all dynamic MAC
addresses and disables the MAC address table so that no new addresses
can be learned.
Link
Mode
Link
Mode
100
FULL
ACT
MODE
COL
FAULT
MASTER
PWR
AT-8024
10Base-T / 100Base-TX Fast Ethernet Switch
RS-232 TERMINAL PORT
Link
Mode
Link
Mode
100
FULL
ACT
MODE
COL
FAULT
MASTER
PWR
AT-8024
10Base-T / 100Base-TX Fast Ethernet Switch
RS-232 TERMINAL PORT
