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cisco output Errors

Hi,

can anyone help me to explain the meaning of "Output Errors" in fastethernet interface. Because i getting huge amount of output error (even more than collision). please see below

hk4500#show interface

FastEthernet0 is up, line protocol is up

Hardware is DEC21140, address is 0060.5c5d.640a (bia 0060.5c5d.640a)

Internet address is 1.1.0.50/16

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)

Half-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

Queueing strategy: fifo

Output queue 0/40, 0 drops; input queue 0/75, 16832 drops

5 minute input rate 326000 bits/sec, 92 packets/sec

5 minute output rate 345000 bits/sec, 79 packets/sec

373691966 packets input, 1195415698 bytes, 0 no buffer

Received 121271343 broadcasts, 0 runts, 46 giants, 5006 throttles

161 input errors, 161 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

0 watchdog, 0 multicast

89 input packets with dribble condition detected

280142390 packets output, 566364375 bytes, 0 underruns

613536 output errors, 443171 collisions, 2 interface resets

0 babbles, 59 late collision, 0 deferred

189 lost carrier, 189 no carrier

0 output buffer failures, 0 output buffers swapped out

Thanks

Raymond

1 REPLY
VIP Purple

Re: cisco output Errors

Hello Raymond,

output errors ussually mean that the device receives too much traffic to hand it off to the internal buffers. When you do a show buffers, you probably see a lot fo misses as well. Try to identify the source of the traffic, e.g. with a sniffer, there is a good, free one available at www.ethereal.com.

Also check out this link for more info on the output of the show interface (fast)ethernet command:

http://www.cisco.com/en/US/products/hw/voiceapp/ps967/products_administration_guide_chapter09186a0080194687.html

Regards,

Georg

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