Equal errors on f0 interface

[darrencoleman]

I've seen this type of symptom before, but never have been able to figure out the reason:

Doing a "show interface f0" brings up the stats for the fastethernet port on the router (1721) and I see that the packets output is equal to output errors and lost carriers. Can anyone give me a clue to why this happens?

Ex: 2999 packets output
2999 output errors
2999 lost carrier

 

[lambent]

may be a cabling issue
try to use a new cable

 

[JOAMON]

Might have something to do with the device it connects to. If connected to older 10Base-T modem,hub, or other then set the interface to speed 10 and half duplex. Clear counters and see if you get any more errors.

 

[lambent]

or maybe you should show us the full output of "show interface f0"

 

[darrencoleman]

When input, CRC, and output errors are present w/ collisions it is usually a hardware mismatch, however, the packets out equal to output errors equal to lost carriers should be of some significance.

FastEthernet0 is up, line protocol is up
Hardware is PQUICC_FEC, address is 0002.1761.a590 (bia 0002.1761.a590)
Description: Company A : 00-00000 Lan
Internet address is xxx.xxx.xxx.xxx/29
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 128/255, txload 1/255, rxload 1/255<------Reliability is less than 50%
Encapsulation ARPA, loopback not set
Keepalive not set
Auto-duplex, 10Mb/s, 100BaseTX/FX<-----------Possible hardware mismatch!
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, 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 2000 bits/sec, 3 packets/sec
5 minute output rate 15000 bits/sec, 4 packets/sec
31162 packets input, 5322656 bytes
Received 227 broadcasts, 0 runts, 0 giants, 0 throttles
142 input errors, 128 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
45150 packets output, 39415810 bytes, 0 underruns<-----Packets out=output errors= lost carriers
45150 output errors, 344 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
45150 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out

 

[JOAMON]

What type of device does it connect to??

 

[PinkLips]

Have you verify with the provider that the curcuit is clean? Is your CSU\DSU taking any errors or alarming?


Thanks,
Nicole