IBM ATM OC-3c - Manual (Page 99)

Identifying the Problem D-5
The numbered steps in this section relate to the
numbered steps shown in Figure D-1.
Access the Physical Layer Statistics Screen
a Select the SWITCH MANAGEMENT option from
the Main Menu. 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. For example the ATM port is:
■
Port 13 on an IBM 8271 Nways Ethernet LAN
Switch Model 612 and IBM 8271 Nways
Ethernet LAN Switch Model 712
■ Port 25 on an IBM 8271 Nways Ethernet LAN
Switch Model 624 and IBM 8271 Nways
Ethernet LAN Switch Model 524
d Select the STATS button. The ATM Port Statistics
screen is displayed.
e Select the PHYSICAL button to display the SONET or
SDH physical layer statistics. An example of the
Physical Layer Statistics screen is shown in Figure D-2.
Figure D-2 ATM Physical Layer Statistics
Are there Physical Layer Errors?
a If the OCD State field is set to Fail, there is a
problem with the physical connection.
b If there are a lot of errors, there is a problem with
the physical connection.
Is the error rate high?
Yes — go to step 3.
No — go to step 4.