Troubleshooting guide

5-40
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-02
Chapter 5 Troubleshooting Switch Router ATM Interface Connections
Troubleshooting DS3 and E3 Interfaces
Displaying Interface Port Configuration
Use the following commands to display the DS3 or E3 interface configuration:
Follow these steps to troubleshoot the DS3 or E3 physical interface:
Step 1 Use the show interfaces atm card/subcard/port command to check the configuration.
Switch# show interfaces atm 0/1/0
ATM0/1/0 is down, line protocol is down
Hardware is ds3suni_Quad
MTU 4470 bytes, sub MTU 4470, BW 45000 Kbit, DLY 0 usec, rely 0/255, load 1/255
Encapsulation ATM, loopback not set, keepalive not supported
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Queueing strategy: fifo
Output queue 0/40, 0 drops; input queue 0/75, 0 drops
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
Switch#
Step 2 Check the ATM field to see whether the interface is up.
If down, check for the following:
• Disconnected or faulty cabling—Check cables.
• Hardware failure—Replace faulty hardware.
If administratively down, the interface has been administratively taken down. Use the no shutdown
interface configuration command to reenable the interface.
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.