2600 Router - Receive Errors

Answered Question

My company uses NetFlow software to find issues with our network. The software indicated we have thousands of "Receive Errors" each day with our Ethernet 0/0 interface. Does anyone know what may be causing these errors and what steps I can take to prevent these error?

Correct Answer by paolo bevilacqua about 8 years 9 months ago

Hi, please configure 100 mbps and full duplex on the switch port also.

This should eliminate the errors that surely are somewhat slowing down traffic.


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paolo bevilacqua Mon, 07/07/2008 - 08:24
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Please check "show interface eth0/0" and if in doubt post output here.



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



paolo bevilacqua Mon, 07/07/2008 - 08:56
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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.

Correct Answer
paolo bevilacqua Mon, 07/07/2008 - 12:29
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Hi, please configure 100 mbps and full duplex on the switch port also.

This should eliminate the errors that surely are somewhat slowing down traffic.


As a recognition to those providing answers, please rate useful posts with the scrollbox below!

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