IBM ATM OC-3c - Manual (Page 109)

Identifying the Problem D-15
Has the Problem been Solved?
Yes — No further action is required.
No — There may be a configuration problem with
your network, see “ELAN Configuration Problems”.
ELAN Configuration Problems
Figure D-7 shows a flow diagram to help you resolve
problems associated with Emulated LAN (ELAN)
configuration. The steps shown in the flow diagram
are described in detail in the following text.
Figure D-7 ELAN Configuration Flow Diagram
Are the LECs on the Same Emulated LAN?
Check that the LECs on the ATM devices that wish to
communicate are on the same Emulated LAN, and
that they are on the same LAN technology. If the LECs
are not on the same ELAN and LAN type, they will not
be able to communicate (except through the use of a
routing protocol).
Are the LECs on the same ELAN and LAN type?
Yes — go to step 3.
No — go to step 2.
Re-map or Route the LEC
Devices will not be able to communicate with each
other if they are on different ELANs or use different
LAN types, for example, if one device is on a Fast
Ethernet LAN and the other is on a Token Ring LAN.
Check that you really wish the end-devices to
communicate with each other and that they use the
same LAN type. If the answer is yes you should either
move one of the LECs or use routing, as described
below:
Move one of the LECs
Move one of the LECs onto the same ELAN as the
other LEC. On the ATM Module you can assign a LEC
to a different ELAN as follows:
a Select the ATM CONFIGURATION option from the
Main Menu. The ATM Module Configuration screen
is displayed, as shown in Figure D-6. Select the
ATM LEC SETUP button.