troubleshooting high number of collisions on cisco 3640

I'm noticing a high number of collisions and deferred packets on my ETH connection Nothing has changed on my network. I have about 30 boxes connected to my 3640. One guy is saying that his downloads are very slow but
his uploads are fast. This seems odd but it got me looking at the router.

 What should I be looking for. Does this asymetric complaint seem legitimate.


Hardware is AmdP2, address is 0010.7b5a.8141 (bia 0010.7b5a.8141)
  Internet address is 63.237.136.1/24
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 22/255
  Encapsulation ARPA, loopback not set, keepalive set (10 sec)
  ARP type: ARPA, ARP Timeout 00:06:00
  Last input 00:00:00, output 00:00:00, output hang never
  Last clearing of "show interface" counters 00:03:14
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 830000 bits/sec, 237 packets/sec
  5 minute output rate 896000 bits/sec, 224 packets/sec
     42825 packets input, 16824308 bytes, 0 no buffer
     Received 284 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 input packets with dribble condition detected
     42083 packets output, 20129824 bytes, 0 underruns
     0 output errors, 2408 collisions, 0 interface resets
                                ^^^^^^^^^^^^^^^
     0 babbles, 0 late collision, 1425 deferred
                                                    ^^^^^^^^^^^^^
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out

duficyAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

lrmooreCommented:
The errors counts are and dropped packets count for much more than collisions. There are zero of both here.
The collisions indicates that the router is plugged into a hub rather than a switch. Switches stop collisions.

0
lrmooreCommented:
As far as the slow downloads go, do you have any access-lists / filters, or a firewall in the mix?
0
duficyAuthor Commented:
the router is plugged into a switch
0
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

lrmooreCommented:
If it is plugged into a switch, then there should never be any collisions. Try a different switch port, make sure there is no speed/duplex mismatch, and try a new patch cable.
0
duficyAuthor Commented:
how do I display/change duplex settings
0
edmonds_robertCommented:
From interface configuration mode:
speed 100 (or speed 10)
duplex auto|full|half
0
lrmooreCommented:
Depends on the switch...
0
lrmooreCommented:
It should be set to 10/half because your 3640 only has a 10Mb port:
MTU 1500 bytes, BW 10000 Kbit,
0
duficyAuthor Commented:
SORRY I WAS GIVEN THE WRONG INFO.

It turns out it's a 2500 router. We plugged the router into a 10 megabyte hub and a laptop into the hub. We tried different ports and different cables. Still getting SLOW downloads but FAST uploads.


Ethernet0 is up, line protocol is up
  Hardware is Lance, address is 0000.0c3f.2937 (bia 0000.0c3f.2937)
  Internet address is 209.113.196.1/24
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec, rely 255/255, load 1/255
  Encapsulation ARPA, loopback not set, keepalive set (10 sec)
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:22, 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, 0 drops
  5 minute input rate 32000 bits/sec, 2 packets/sec
  5 minute output rate 27000 bits/sec, 3 packets/sec
     3452 packets input, 2678973 bytes, 0 no buffer
     Received 21 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     0 input packets with dribble condition detected
     3437 packets output, 2663292 bytes, 0 underruns
     0 output errors, 9 collisions, 5 interface resets
     0 babbles, 0 late collision, 17 deferred
     0 lost carrier, 0 no carrier
     0 output buffer failures, 0 output buffers swapped out
0
scraig84Commented:
Lrmoore - I am a bit surprised by some of your posts -

"The collisions indicates that the router is plugged into a hub rather than a switch. Switches stop collisions."

and

"If it is plugged into a switch, then there should never be any collisions. Try a different switch port, make sure there is no speed/duplex mismatch, and try a new patch cable."

A switch port does not "stop collisions", but it is the barrier of a collision domain.  Even with a single device plugged into a switch port, if both are set to half-duplex such as in this case (and you have no option to do otherwise with that hardware), than collisions can and will happen.  Therefore, collisions are not indicitive that a hub is present, but instead indicates that either half-duplex communications are present and normal operation is occuring, or a duplex-mismatch is present.

duficy - What you are seeing looks pretty normal.  I think you may want to focus your attention on something other than the router.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
duficyAuthor Commented:
Thanks, I will look elsewhere. I suspect the problem could be the line.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Routers

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.