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what is the possible cause of having always is disconnected in the network?

I have been trouble in my network for almost a week and i didn't figure out what is the cause of intermittent connection 2 of my client with windows 7 installed.

I'm using WS-C3550 Cisco Switch on HQ, configure as trunk the port #1 which is UBNT Wireless is inserted.  on branch A i'm using cisco 2960, in port gi0/1 UBNT Wireless is inserted, meaning we are using wireless connectivity to link this two sites. My problem is 2 computer is always disconnect in the network with a certain time, I already replace the Ethernet cable, change the speed and duplex but same problem occurred. but other PC with XP OS installed with no problem. i just want to know if there are protocol not compatible between PC to cisco switch.

Here are some details

HQ

SWRouter#show int fa 0/1
FastEthernet0/1 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 000d.2848.a901 (bia 000d.2848.a901)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 2/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  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 1056000 bits/sec, 144 packets/sec
  5 minute output rate 475000 bits/sec, 110 packets/sec
     11580406 packets input, 2116489376 bytes, 0 no buffer
     Received 3058656 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 1239883 multicast, 0 pause input
     0 input packets with dribble condition detected
     27734460 packets output, 3476907667 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

-------------------------------------------------

BRANCH A

 

Pricesmart_Dacera>show int gi 0/1
GigabitEthernet0/1 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 3c0e.233c.d399 (bia 3c0e.233c.d399)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 100Mb/s, link type is auto, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  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 74000 bits/sec, 35 packets/sec
  5 minute output rate 11000 bits/sec, 13 packets/sec
     4464105 packets input, 1092571901 bytes, 0 no buffer
     Received 2606921 broadcasts (921122 multicasts)
     1 runts, 0 giants, 0 throttles
     1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 921122 multicast, 0 pause input
     0 input packets with dribble condition detected
     2113803 packets output, 331286478 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

-----------------------------------------

PORT of PC1 which has been always disconnected every 30 or 1 hour.

Pricesmart_Dacera>show int fa 0/8
FastEthernet0/8 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 3c0e.233c.d388 (bia 3c0e.233c.d388)
  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)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, 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 5000 bits/sec, 2 packets/sec
  5 minute output rate 93000 bits/sec, 32 packets/sec
     466896 packets input, 100716636 bytes, 0 no buffer
     Received 76760 broadcasts (4823 multicasts)
     0 runts, 0 giants, 0 throttles
     20 input errors, 20 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 4823 multicast, 0 pause input
     0 input packets with dribble condition detected
     1635257 packets output, 483196219 bytes, 0 underruns
     0 output errors, 734 collisions, 7 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out

Thank you.

Regards,

Raffy

3 REPLIES 3
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Hall of Fame Community Legend

20 input errors, 20 CRC, 0 frame, 0 overrun, 0 ignored
 0 output errors, 734 collisions, 7 interface resets

Can you tell us what is the uptime of the switches?  Fa0/8 is showing duplex errors.  Someone has hard-coded speed/duplex settings on either the switch port or the PC (or both)?

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Pricesmart_Dacera uptime is 4 days, 8 hours, 26 minutes
System returned to ROM by power-on
System image file is "flash:/c2960-lanbasek9-mz.122-55.SE7/c2960-lanbasek9-mz.12
2-55.SE7.bin" i try to hard-code the port# 8 to solve the problem but it can't.

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Hall of Fame Community Legend

Post the "sh interface" output of the port connected to the PC again.  I want to see if the port has line error incrementing.

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