Troubleshooting guide

10-21
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 10 Troubleshooting Ethernet, ATM Uplink, and POS Uplink Interfaces
Troubleshooting Gigabit Ethernet Interface Modules
Two-Port Gigabit Ethernet Interface Module LEDs
Table 10-4 describes the LEDs used to confirm and troubleshoot the operation of interface modules. The
LEDs on interface modules indicate the status of the modules and their ports.
Displaying Gigabit Ethernet Interface Module Configurations
To display the Gigabit Ethernet interface module using the Ethernet processor interface type
configuration and status, use the following commands:
Table 10-4 Two-Port Gigabit Ethernet Interface Module LED Descriptions
LED State Description
Op-Det On An optical signal from another Gigabit Ethernet
module is detected. It is steadily on when there is
a Gigabit connection.
Off No Gigabit Ethernet optical signal is detected.
Tx (Transmit) Green A port is transmitting a packet. Green for
approximately 50 ms.
Off No signal is detected.
Full-Duplex On A port is operating in full-duplex mode. This is
always the case for an operational Gigabit
Ethernet port.
Link Green A port is operational (a signal is detected).
Off No signal is detected.
Rx (Receive) Green A port is receiving a packet. Green for
approximately 50 ms.
Off No signal is detected.
Command Purpose
show interfaces gigabitEthernet
card/subcard/port
Shows the status of the physical interface.
show controllers gigabitEthernet
card/subcard/port
Shows the interface memory management
and error counters.
show controllers c8500 counters Shows the counters on the switch router's
interfaces.