Troubleshooting guide

10-10
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 10 Troubleshooting Ethernet, ATM Uplink, and POS Uplink Interfaces
Troubleshooting 10/100 Ethernet Interface Modules
Displaying 10/100BASE-T and 100BASE-FX Interface Module Configurations
To display the 10/100 Ethernet interface module configuration and status, use the following commands:
Follow these steps to troubleshoot a 10/100 Ethernet interface module:
Step 1 Use the show interfaces FastEthernet card/subcard/port command to check the configuration.
Switch# show interfaces fastEthernet 3/0/0
FastEthernet3/0/0 is up, line protocol is up
Hardware is epif_port, address is 0090.2156.d837 (bia 0090.2156.d837)
Internet address is 172.20.52.36/27
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, Auto Speed, 100BaseTX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:29, 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
21584 packets input, 7591871 bytes
Received 3 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored 0 abort
0 watchdog, 21563 multicast
0 input packets with dribble condition detected
26882 packets output, 7764915 bytes, 0 underruns(0/0/0)
0 output errors, 0 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Switch#
Step 2 Check the FastEthernet field to see whether the interface is up. If it is down, check for the following:
• Disconnected or faulty cabling—Check cables.
• Hardware failure—Swap 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 FastEthernet card/subcard/port Shows the status of the physical interface.
show controllers FastEthernet
card/subcard/port
Shows the interface memory management
and error counters.
show controllers c8500 counters Shows the counters on the switch router's
interfaces.