To communicate with a device, the software must be able to map the MAC address of the destination device to the destination edge-device's ATM address.

This mapping is normally performed by the LEC, and for the vast majority of devices you do not need to map MAC addresses to ATM addresses.

The MAC address and ATM address mappings are stored in the LAN Emulation ARP Table (which should not be confused with the IP ARP Table).

To access the ATM ARP Table screen access the ATM Port Setup screen, as described in "ATM Port Setup", and then select the ARP TABLE button. An example of the ATM ARP Table screen is shown in Figure 8-8.

Figure 8-8 ATM ARP Table Screen

VLAN Allows you to select a VLAN, and display address information about remote systems connected to that VLAN.

Port Identifies the selected port.

Far MAC Address Shows the MAC Address on the edge-device at the far end of the connection.

Far ATM Address Shows the ATM Address for the LEC on the edge-device at the far end of the connection.

Type The address entry can be:

Permanent - The address entries are retained even if the device is reset or a power-off/on cycle occurs. All entries made through this screen are stored as Permanent entries.

Dynamic - The address entries are aged out after a set period of time.

Static - The address entries are discarded when the switch is reset.

The following fields are used in conjunction with the buttons at the bottom of the screen:

Far MAC Address Allows you to type in the MAC address of end-stations in the network.

Far ATM Address Allows you to type in the ATM address of the far end LEC associated with the far end MAC address.

FIND ATM ADDRESS This button allows you to locate the ATM address mapped to a specified MAC address.

REFRESH This button updates the view of the ARP Table to include the latest available information.

INSERT This button allows you to create a MAC Address to ATM address mapping in the ARP Table.

DELETE This button allows you to delete a MAC address to ATM address mapping in the ARP Table.

Creating a MAC Address to ATM Entry

An easy way to edit an entry is to select a similar entry from the listbox using the spacebar. The far end ATM and MAC addresses of that entry are shown in the edit fields. You can then edit the addresses (without losing or changing the original entry) and select the INSERT button to create a new entry.

If you cannot select an entry in the listbox (because you are creating the first entry), use the following method:

1 .   In the Far MAC Address field, type in the MAC address of the device to be added to the database.

2 .   In the Far ATM Address field, type in the far end ATM address.

3 .   Select the INSERT button.

Finding an Address Entry

1 .   In the Far MAC Address field, type in the MAC address associated with the ATM address you are trying to locate.

2 .   Select the FIND ATM ADDRESS button. An asterisk (*) is shown next to the entry in the database listbox.

Updating Address Entries

To view up-to-date ARP Table entries, select the REFRESH button.

Deleting an Address Entry

1 .   Within the listbox, use the spacebar to select the entry you wish to delete.

2 .   Select the DELETE button.