late collisions

Discussion in 'Cisco' started by chris-c, Aug 10, 2004.

  1. chris-c

    chris-c Guest

    Hello All,

    We are experiencing some performance problems with our network, on the
    console I keep getting

    *Apr 29 17:45:08.558: %PQUICC_ETHER-5-LATECOLL: Unit 0, late collision
    error

    When I look at the interface stats on e0 (connected to isp)
    I get as follows

    Ethernet0 is up, line protocol is up
    Hardware is PQUICC Ethernet, address is 000d.28dc.2345 (bia
    000d.28dc.2345)
    Internet address is 213.161.82.74
    MTU 1500 bytes, BW 50000 Kbit, DLY 1000 usec,
    reliability 251/255, txload 1/255, rxload 1/255
    Encapsulation ARPA, loopback not set
    Keepalive set (10 sec)
    Half-duplex, 10BaseT
    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: 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 274000 bits/sec, 129 packets/sec
    5 minute output rate 264000 bits/sec, 130 packets/sec
    300219322 packets input, 677005852 bytes, 0 no buffer
    Received 114554 broadcasts, 0 runts, 0 giants, 0 throttles
    6985774 input errors, 0 CRC, 0 frame, 4 overrun, 6980666 ignored
    0 input packets with dribble condition detected
    239729848 packets output, 1422191958 bytes, 0 underruns
    6985842 output errors, 2698458 collisions, 1 interface resets
    0 babbles, 6985829 late collision, 5701217 deferred
    13 lost carrier, 0 no carrier
    0 output buffer failures, 0 output buffers swapped out

    Ive looked at our other routers and they dont have any late
    collissions or nowhere near as many input/output errors - any ideas ?

    Thanks
    ps- the inside fastethernet interface is connected to our switch and
    shows up normally.
     
    chris-c, Aug 10, 2004
    #1
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  2. chris-c

    none Guest

    It looks like a possible speed/duplex mismatch or auto-negotiation is
    failing on one or both ends.

    I would first hardcode both ends of that link. I recommend either 100-full
    or 10-full if the switch it's connected to supports it. Then clear the
    counters.

    You're still going to see some collisions on "Half-duplex, 10BaseT" if you
    continue to use it.


    "chris-c" <> wrote in message
    news:...
    > Hello All,
    >
    > We are experiencing some performance problems with our network, on the
    > console I keep getting
    >
    > *Apr 29 17:45:08.558: %PQUICC_ETHER-5-LATECOLL: Unit 0, late collision
    > error
    >
    > When I look at the interface stats on e0 (connected to isp)
    > I get as follows
    >
    > Ethernet0 is up, line protocol is up
    > Hardware is PQUICC Ethernet, address is 000d.28dc.2345 (bia
    > 000d.28dc.2345)
    > Internet address is 213.161.82.74
    > MTU 1500 bytes, BW 50000 Kbit, DLY 1000 usec,
    > reliability 251/255, txload 1/255, rxload 1/255
    > Encapsulation ARPA, loopback not set
    > Keepalive set (10 sec)
    > Half-duplex, 10BaseT
    > 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: 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 274000 bits/sec, 129 packets/sec
    > 5 minute output rate 264000 bits/sec, 130 packets/sec
    > 300219322 packets input, 677005852 bytes, 0 no buffer
    > Received 114554 broadcasts, 0 runts, 0 giants, 0 throttles
    > 6985774 input errors, 0 CRC, 0 frame, 4 overrun, 6980666 ignored
    > 0 input packets with dribble condition detected
    > 239729848 packets output, 1422191958 bytes, 0 underruns
    > 6985842 output errors, 2698458 collisions, 1 interface resets
    > 0 babbles, 6985829 late collision, 5701217 deferred
    > 13 lost carrier, 0 no carrier
    > 0 output buffer failures, 0 output buffers swapped out
    >
    > Ive looked at our other routers and they dont have any late
    > collissions or nowhere near as many input/output errors - any ideas ?
    >
    > Thanks
    > ps- the inside fastethernet interface is connected to our switch and
    > shows up normally.
     
    none, Aug 10, 2004
    #2
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  3. chris-c

    Hansang Bae Guest

    In article <F08Sc.1542$>,
    says...
    > It looks like a possible speed/duplex mismatch or auto-negotiation is
    > failing on one or both ends.
    >
    > I would first hardcode both ends of that link. I recommend either 100-full
    > or 10-full if the switch it's connected to supports it. Then clear the
    > counters.
    >
    > You're still going to see some collisions on "Half-duplex, 10BaseT" if you
    > continue to use it.



    Almost certainly a duplex mismatch. (long shot these days is cable
    plant that's too long). But please note that HD world will see
    collisions and THAT'S OK!! Nothing to worry about.

    Late collisions are bad and needs investigation.


    --

    hsb

    "Somehow I imagined this experience would be more rewarding" Calvin
    *************** USE ROT13 TO SEE MY EMAIL ADDRESS ****************
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    Due to the volume of email that I receive, I may not not be able to
    reply to emails sent to my account. Please post a followup instead.
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    Hansang Bae, Aug 11, 2004
    #3
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