The output of Show interface fastEthernet 0/0 is as follows:

show interface fastEthernet 0/0

FastEthernet0/0 is up, line protocol is up

Hardware is AmdFE, address is 000e.833e.2200 (bia 000e.833e.2200)

Internet address is 10.10.1.6/24

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)

Full-duplex, 100Mb/s, 100BaseTX/FX

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: 1/75/1705/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: fifo

Output queue: 0/40 (size/max)

5 minute input rate 193000 bits/sec, 179 packets/sec

5 minute output rate 192000 bits/sec, 176 packets/sec

1181645207 packets input, 2438941583 bytes

Received 47201389 broadcasts, 0 runts, 0 giants, 0 throttles

4429681 input errors, 4429681 CRC, 0 frame, 0 overrun, 0 ignored

0 watchdog

0 input packets with dribble condition detected

1129333917 packets output, 2498682094 bytes, 0 underruns

0 output errors, 0 collisions, 4 interface resets

0 babbles, 0 late collision, 0 deferred

122 lost carrier, 0 no carrier

0 output buffer failures, 0 output buffers swapped out

You monitoring tool is correct, there are too many errors for a normal ethernet link.

Check cabling and work with the manager of the connected device to have the issue resolved.

I have a Cisco 3560G switch that is connected to that FastEthernet port. I swapped out the cable that connects the router to the switch - still giving errors. The port on the switch that the router is plugged into is indicating that it is running at half duplex. Is this normal?

Also, Would these errors cause a great slow down on our network? All of the PCs in my company points to this router as their gateway.

Thank you very much, this worked.