Static Addresses; Dynamic Addresses - Dell PowerConnect 3048 User Manual

Static Addresses

From the Static Addresses page, you can specify the MAC address and port number of systems that are to remain available to the switch for an
indeterminate amount of time.
The following options are available:
MAC Address — Allows you to enter the MAC address of a system you want to set as static.
l
Port Selection — Allows you to select the port associated with that system.
l
List box — Lists all static addresses.
l
Add — Adds any address when you select it from the list box and click the Add button.
l
Remove — Removes any address when you select it from the list box and click Remove.
l
To save any changes you make in this page for the current session, click Apply. To reset these fields to their current value, click Reload.

Dynamic Addresses

The Dynamic Address lookup table allows you to view the MAC addresses that are currently in the address database. When addresses are in the database,
the packets intended for those addresses are forwarded directly to those ports. You can filter out the table by port, virtual local area network (VLAN), and MAC
address by checking those fields.
Dynamic MAC address learning is enabled by default. This is the standard mode for a network switch. In some networks, the administrator may want to create
a secured network by disabling the dynamic address learning capabilities. When this is done, all current dynamic address entries will be locked in. These
addresses will not age out and new addresses will not be learned. In addition, if a new address is detected on a port, the switch will disable the port with the
new address, save the current settings to NVRAM, and send out a Simple Network Management Protocol (SNMP) trap warning. This feature is used to block
computers that were not on the network before the lockdown from attempting to access the network. Once a port is automatically disabled, the administrator
can reenable the port manually. The NVRAM will only be saved the first time a given port detects a new address. The aging time should be raised before
disabling the dynamic address learning to provide enough time for the switch to learn all current MAC addresses without the possibility of aging out.
This page contains the following options by which to query the dynamic MAC address table:
Port — Check the option box and select a port from the drop-down list.
l
VLAN ID — Check the option box and type the appropriate VLAN ID.
l
MAC Address — Check the option box and select the address from the list box provided.
l
Query button — Click this button to execute the query once you have selected the criteria for the query.
l