D-Link DES-3624 manual 20. Configure Filtering and Forwarding table screen

Stackable NWay Ethernet Switch User’s Guide

is defined as static entries that may be added and removed from the Filtering Database by the user. They are not automatically removed by any timeout mechanism.

The Configure Filtering and Forwarding table screen allows you to stop or start address learning, change the way the Switch treats MAC address table entries, and select an age-out time of the MAC address in the selected address table. This screen also permits you to access three additional configuration screens from the menu at the bottom of the window.

Choose Configure Filtering and Forwarding Table from the System Configuration menu to access the following screen:

Figure 6-20. Configure Filtering and Forwarding table screen

The following fields at the top of the screen can be set:

♦Lock Address Table(STOPs Learning) Mostly used for security purposes, when the forwarding table is locked the Switch will no longer learn the MAC addresses for new hosts. If your network configuration doesn’t change, locking the forwarding table helps keep intruders off your network since any packet coming from an unknown source address will be dropped by the Switch.

♦Address Table Lookup Mode This setting allows the user to tailor the MAC address look up procedure. Choices are Level 0, Level 1, Level 2, Level 3, Level 4, Level 5, Level, 6, Level 7. The higher the level, the more MAC addresses can be learned by the Switch. However, a side effect is that throughput will be degraded the higher the level you select. This setting will take effect after your system reboots.

♦MAC Address Aging Enter the desired MAC address age-out time in this field (10 to 9999 seconds).

64 Using the Console Interface