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Address Table Settings
96
Instruction Manual - NXA-ENET8-POE+
Address Table Settings
Switches store the addresses for all known devices. This information is used to pass traffic directly between the inbound and
outbound ports. All the addresses learned by monitoring traffic are stored in the dynamic address table. You can also manually
configure static addresses that are bound to a specific port.
This chapter describes the following topics:

MAC Address Learning - Enables or disables address learning on an interface.

Static MAC Addresses - Configures static entries in the address table.

Address Aging Time - Sets timeout for dynamically learned entries.

Dynamic Address Cache - Shows dynamic entries in the address table.

MAC Notification Traps - Issue trap when a dynamic MAC address is added or removed.
Configuring MAC Address Learning
Use the MAC Address > Learning Status page to enable or disable MAC address learning on an interface.
Command Usage

When MAC address learning is disabled, the switch immediately stops learning new MAC addresses on the specified
interface. Only incoming traffic with source addresses stored in the static address table (see the Setting Static
Addresses section on page 97) will be accepted as authorized to access the network through that interface.

Dynamic addresses stored in the address table when MAC address learning is disabled are flushed from the system, and no
dynamic addresses are subsequently learned until MAC address learning has been re-enabled. Any device not listed in the
static address table that attempts to use the interface after MAC learning has been disabled will be prevented from
accessing the switch.

Also note that MAC address learning cannot be disabled if any of the following conditions exist:

802.1X Port Authentication has been globally enabled on the switch (see the Configuring 802.1x Port
Authentication section on page 173).

Security Status (see the Configuring Port Security section on page 172) is enabled on the same interface.
The following table lists the options on this page:
Perform these steps to enable or disable MAC address learning:
1.
Click MAC Address > Learning Status .
2. Set the learning status for any interface.
3. Click Apply .
MAC Address - Learning Status Options
Interface Displays a list of ports or trunks.
Port Port Identifier (Range: 1-10/28)
Trunk Trunk Identifier (Range: 1-8)
Status The status of MAC address learning. (Default: Enabled)
FIG. 101
Configuring MAC Address Learning