Troubleshooting guide

5-21
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-02
Chapter 5 Troubleshooting Switch Router ATM Interface Connections
Troubleshooting 155-Mbps and 622-Mbps Interfaces
Note Single-mode fiber-optic interface connectors are blue, and multimode connectors are black.
Displaying Interface Port Configuration
To display the interface configuration, use the following commands:
Table 5-3 155-Mbps and 622-Mbps Port Adapter LED Descriptions
LED Status Description
RX (Receive) Off
Flashing green
Red
LOS
1
or port adapter is shut down.
Cells are being received. LED blinks every 5 seconds and pulse rate
increases with data rate.
Alarm (LOF
2
, LCD
3
, AIS
4
).
1. LOS = loss of signal
2. LOF = loss of frame
3. LCD = loss of cell delineation
4. AIS = alarm indication signal
TX (Transmit) Off
Flashing green
Flashing yellow
Steady yellow
No transmit line activity indication.
Cells are being transmitted. LED pulse rate increases with data rate.
Loopback.
FERF
5
alarm.
5. FERF = far-end receive failure
Command Purpose
show interfaces atm card/subcard/port Shows the status of the physical interface.
show atm interface atm card/subcard/port Shows the interface configuration.
show controllers atm card/subcard/port Shows the interface memory management
and error counters.