Troubleshooting guide

5-47
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-02
Chapter 5 Troubleshooting Switch Router ATM Interface Connections
Troubleshooting CES T1 and CES E1 Interfaces
Port Adapter LEDs
The port adapter faceplate LEDs provide status information for individual CES T1 and CES E1 UTP and
coaxial interface connections of the port adapter. The LEDs are described in Table 5-11.
Note Single-mode fiber-optic interface connectors are blue, and multimode connectors are black.
Displaying Interface Port Configuration
To display the CES T1 and CES E1 interface configuration, use the following commands:
Table 5-11 CES T1 and CES E1 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 five 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 alarm.
5
5. FERF = far-end receive failure
Command Purpose
show interfaces cbr card/subcard/port Shows the status of the physical interface.
show ces interface atm card/subcard/port Shows the interface configuration.