Question about troubleshooting ethernet interfaces

Hello esteemed colleagues, I've been running into a problem with the e0 port on my CCNA lab 2520, and I was wondering if any of you had any insight that could help me troubleshoot it.

I suspect the port is just hosed. Here's the output of "sh int e0"

Ethernet0 is up, line protocol is down
Hardware is Lance, address is 0050.547f.c44e (bia 0050.547f.c44e)
Internet address is 192.168.10.129/27
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 225/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:03:02, output 00:00:08, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue :0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1 packets input, 618 bytes, 0 no buffer
Received 1 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 input packets with dribble condition detected
19 packets output, 1140 bytes, 0 underruns
18 output errors, 0 collisions, 6 interface resets
0 babbles, 0 late collision, 0 deferred
18 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out

As you can see, there are a high number of interface resets and output errors, and lost carriers. I've tried swapping the AUI to RJ45 adapter with another one I know is working, swapping cables, and connecting to another port on another switch that I know is working.

Any suggestions?

Thanks!

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Comments

gojericho0

Is there another port on the 2520 you can try?

How about shut/no shut the interface or rebooting the router?

Empathy

Actually, there is a "10baseT" port as well as the AUI port, but a show interfaces command only lists one Ethernet port, the AUI port is labeled ethernet0. So I'm not sure what the deal is there. I've tried shut/no shut, with interface debugging on, and the only additional info that gives me is an error message that the "carrier signal was lost. Transceiver problem?"

tiersten

Empathy wrote: »

Actually, there is a "10baseT" port as well as the AUI port, but a show interfaces command only lists one Ethernet port, the AUI port is labeled ethernet0. So I'm not sure what the deal is there. I've tried shut/no shut, with interface debugging on, and the only additional info that gives me is an error message that the "carrier signal was lost. Transceiver problem?"

You sure it is a 2520? A 2520 has 1 AUI and 1 Token Ring port.

It sounds like you've got a 2522 or 2524 which have a shared AUI and 10Base-T port.

The 2522/2524 has a built in transceiver for the 10Base-T port. They're the same port as the AUI port which is why you can't see any difference from IOS. If you have the 10BaseT port anyway then you can remove the AUI transceiver which sounds faulty in some way. Is it securely attached and the latch slid over?