10-20-2009 04:01 AM - edited 03-04-2019 06:26 AM
Good day,
I am seeing ouput errors on a half duplex interface facing a comtrend modem.
What could be causing this? I'm not seeing any other errors besides collisions which are normal for half duplex.
10-20-2009 04:56 AM
Which output errors? Send the complete show interface.
10-20-2009 05:00 AM
Ethernet1 is up, line protocol is up
Hardware is PQUICC_FEC, address is 0011.20da.dcb1 (bia 0011.20da.dcb1)
Internet address is
MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Auto-duplex, 10Mb/s
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:10, output 00:00:00, output hang never
Last clearing of "show interface" counters 19:14:45
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 2000 bits/sec, 3 packets/sec
204404 packets input, 176145912 bytes, 0 no buffer
Received 1374 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
164757 packets output, 29247181 bytes, 0 underruns
1301 output errors, 1844 collisions, 0 interface resets
0 babbles, 0 late collision, 0 deferred
9 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
10-20-2009 08:35 AM
That should be "excessive collisions", check "show controllers ethernet 1".
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