Lots of input errors...

[Michael K. Smith]

Hello:

Judging from your output I would say two things:

1) You have a bad cable.  CRC and framing errors are usually a result of bad
media.
2) You should set the port to auto/auto, not 100/Full hard set, unless you
have specifically set that up in rc.conf.  If one side is hard set and the
other is set to auto, you will see lots of runts because of a duplex
mismatch.  I think the RFC states you have to go to half duplex if you are
autosensing and the other side doesn't respond, which is the case if it's
hard set.

Mike

On 6/27/03 11:48 AM, "Shawn Ramsey" <shawn at cpl.net> wrote:

>> Improperly negotiating 100-BT/FD and generating lots of late collisions,
>> for one.  Is the switch managed?  What does it's syslog output or the
>> local CLI say about the port(s) in question?  In Cisco parlance, you may
>> want to clear the interface counters and observe 'sh int...' output while
>> transferring a large file.  I must say, however, that if negotiation is to
>> blame (and Cisco's is notoriously bad), you should be seeing degrading
>> network performance.  (I think you'd notice that.)
> 
> Well, we had our ISP clear the stats, and their end is showing no errors...
> Here is the output before and after, although the stats before are like 35
> weeks old. The second stats are about three hours old.
> 
> ba01.b001200-2.lax01#sh int FastEthernet21
> FastEthernet21 is up, line protocol is up
> Hardware is epif_port, address is 0005.5e43.eb1b (bia 0005.5e43.eb1b)
> Description: CUST-W FE LZ-MO
> MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 187/255
> Encapsulation ARPA, loopback not set, keepalive set (10 sec)
> Full-duplex, 100Mb/s, 100BaseTX
> 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 35w0d
> Queueing strategy: fifo
> Output queue 0/40, 0 drops; input queue 0/75, 0 drops
> 5 minute input rate 28864000 bits/sec, 6461 packets/sec
> 5 minute output rate 73561000 bits/sec, 7564 packets/sec
>    771797665 packets input, 3456898980 bytes, 0 no buffer
>    Received 10505 broadcasts, 86892 runts, 15 giants, 0 throttles
>    188392 input errors, 90405 CRC, 11080 frame, 0 overrun, 0 ignored, 0
> abort
>    0 watchdog, 30038839 multicast
>    0 input packets with dribble condition detected
>    2127564566 packets output, 1282358462 bytes, 0 underruns
>    0 output errors, 0 collisions, 0 interface resets
>    0 babbles, 0 late collision, 0 deferred
>    0 lost carrier, 0 no carrier
>    0 output buffer failures, 0 output buffers swapped out
> 
> ba01.b001200-2.lax01#sh int FastEthernet21
> FastEthernet21 is up, line protocol is up
> Hardware is epif_port, address is 0005.5e43.eb1b (bia 0005.5e43.eb1b)
> Description: CUST-W FE LZ-MO
> MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec, rely 255/255, load 192/255
> Encapsulation ARPA, loopback not set, keepalive set (10 sec)
> Full-duplex, 100Mb/s, 100BaseTX
> 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 02:44:02
> Queueing strategy: fifo
> Output queue 0/40, 0 drops; input queue 1/75, 0 drops
> 5 minute input rate 21260000 bits/sec, 5911 packets/sec
> 5 minute output rate 75635000 bits/sec, 7375 packets/sec
>    57291936 packets input, 981288818 bytes, 0 no buffer
>    Received 9 broadcasts, 0 runts, 0 giants, 0 throttles
>    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
>    0 watchdog, 0 multicast
>    0 input packets with dribble condition detected
>    72313803 packets output, 2238000602 bytes, 0 underruns
>    0 output errors, 0 collisions, 0 interface resets
>    0 babbles, 0 late collision, 0 deferred
>    0 lost carrier, 0 no carrier
>    0 output buffer failures, 0 output buffers swapped out
> 
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-- 
Michael K. Smith          NoaNet
206.219.7116 (work)       206.579.8360 (cell)
mksmith at noanet.net        http://www.noanet.net