IBM ATM OC-3c - Manual (Page 110)

D-16 A PPENDIX D: T ROUBLESHOOTING
An example of the ATM LEC Setup screen is shown
in Figure D-8.
b Select the VLAN associated with the LEC that you
wish to move.
c Either enter the ATM address of the LES that the
LEC is going to join, or select LECS.
d In the ELAN name field, enter the name of the
ELAN that the LEC is now to join and select the
APPLY button.
Figure D-8 ATM VLAN LEC Setup
Use routing
Devices on one Emulated LAN can only communicate
with devices on another Emulated LAN using routing
protocols. Routing is outside the scope of this user
guide. Consult the user guide that accompanies your
router.
Is the MAC Address in the Switch Database?
If the MAC Address of a device connected to an
Ethernet port on the Switch is not entered in the
Switch Database, none of the LECs on the Switch can
act as a proxy for that device. All LE_ARP requests will
fail to locate the MAC address, and the requesting
LEC will not be able to map an ATM address to that
MAC address.
If a LEC fails to map an ATM address to a MAC
address, locate the device with that MAC address.
Is the MAC address in the Switch Database of the
Switch connected to the device with that MAC
address?
Yes — Go to step 5.
No — Go to step 4.
Enter the MAC Address in the Switch Database
There are several reasons why the MAC address is not
in the Switch Database:
■ The Switch Database is full.
■ The entry may have timed-out.
■ There may have been a problem with the physical
connection between the device and the Ethernet
port on the Switch.
Identify the problem, and ensure that the MAC
address is added to the Switch Database.
Is There Still a Problem?
Yes — Contact Technical Support. Refer to Appendix E.
No — No further action is required.