IBM ATM OC-3c - Manual (Page 102)

D-8 A PPENDIX D: T ROUBLESHOOTING
Access the ATM VLAN LEC Status Screen
a From the Main Menu select the SWITCH
MANAGEMENT option. The Switch Management
screen is displayed.
b Ensure that the Port option is selected in the
Management Level field.
c Ensure that the ATM port number is entered in the
Port ID field.
d Select the STATS button. The ATM Port Statistics
screen is displayed.
e Select the LEC button to display the ATM VLAN
LEC Status screen. An example of the ATM VLAN
LEC Status screen is shown in Figure D-5.
Figure D-5 ATM VLAN LEC Status Screen
Is the LEC ATM Address Valid for the Default
VLAN?
Check that the ATM address in the LEC ATM Address
field is valid. For example, if the first part of the
address (the network prefix) is all zeros the ATM
Switch has not registered the ATM Module’s LEC.
You can confirm that the ATM address of the LEC for
the default VLAN is registered by checking the
registered address table on the adjacent ATM Switch.
Is the ATM address valid and registered with the ATM
Switch?
Yes — go to step 22.
No — go to step 11.
Is the ATM Switch Using AAL5?
It is very unlikely that your network has been
configured to use incompatible devices, but to rule
out the possibility, check that the ATM Switch uses
the AAL5 protocol.
Does the ATM Switch also use AAL5?
Yes — go to step 13.
No — go to step 12.