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Silver

WS-C3560-48PS port going up and down

one off our switch showing in logs

000895: Feb 20 12:02:26 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to up

000896: Feb 20 12:02:28 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to up

000897: Feb 20 12:02:46 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to down

000898: Feb 20 12:02:47 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to down

000899: Feb 20 12:02:50 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to up

000900: Feb 20 12:02:52 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to up

000901: Feb 20 12:03:09 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to down

000902: Feb 20 12:03:10 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to down

000903: Feb 20 12:03:13 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to up

000904: Feb 20 12:03:15 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to up

000905: Feb 20 12:03:32 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to down

000906: Feb 20 12:03:33 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to down

000907: Feb 20 12:03:36 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to up

000908: Feb 20 12:03:38 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to up

000909: Feb 20 12:03:55 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to down

000910: Feb 20 12:03:56 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to down

000911: Feb 20 12:03:59 NZDT: %LINK-3-UPDOWN: Interface FastEthernet0/16, changed state to up

000912: Feb 20 12:04:01 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to up

000913: Feb 20 12:04:18 NZDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/16, changed state to down

its just keep going after some time switch reboot it self and reboot status showes

Last reset from address error

is this a bug ?

thanks

3 REPLIES
Hall of Fame Super Gold

WS-C3560-48PS port going up and down

Post the following output:

1.  sh interface F0/16; and

2.  sh controll e F0/16

Silver

WS-C3560-48PS port going up and down

please see below

#sh int f0/16

FastEthernet0/16 is up, line protocol is up (connected)

  Hardware is Fast Ethernet, address is 0018.184e.0392 (bia 0018.184e.0392)

  Description: USER VOICE/DATA PORT

  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 0 bits/sec, 0 packets/sec

  5 minute output rate 3000 bits/sec, 4 packets/sec

     0 packets input, 0 bytes, 0 no buffer

     Received 0 broadcasts (0 multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored

     0 watchdog, 0 multicast, 0 pause input

     0 input packets with dribble condition detected

     24810 packets output, 3226551 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

#sh controllers ethernet-controller f0/16

     Transmit FastEthernet0/16                Receive

      3234001 Bytes                                0 Bytes

         1968 Unicast frames                       0 Unicast frames

        12173 Multicast frames                     0 Multicast frames

        10755 Broadcast frames                     0 Broadcast frames

            0 Too old frames                       0 Unicast bytes

            0 Deferred frames                      0 Multicast bytes

            0 MTU exceeded frames                  0 Broadcast bytes

            0 1 collision frames                   0 Alignment errors

            0 2 collision frames                   0 FCS errors

            0 3 collision frames                   0 Oversize frames

            0 4 collision frames                   0 Undersize frames

            0 5 collision frames                   0 Collision fragments

            0 6 collision frames

            0 7 collision frames                   0 Minimum size frames

            0 8 collision frames                   0 65 to 127 byte frames

            0 9 collision frames                   0 128 to 255 byte frames

            0 10 collision frames                  0 256 to 511 byte frames

            0 11 collision frames                  0 512 to 1023 byte frames

            0 12 collision frames                  0 1024 to 1518 byte frames

            0 13 collision frames                  0 Overrun frames

            0 14 collision frames                  0 Pause frames

            0 15 collision frames

            0 Excessive collisions                 0 Symbol error frames

            0 Late collisions                      0 Invalid frames, too large

            0 VLAN discard frames                  0 Valid frames, too large

            0 Excess defer frames                  0 Invalid frames, too small

         7011 64 byte frames                       0 Valid frames, too small

        14024 127 byte frames

         1056 255 byte frames                      0 Too old frames

         2474 511 byte frames                      0 Valid oversize frames

          259 1023 byte frames                     0 System FCS error frames

           72 1518 byte frames                     0 RxPortFifoFull drop frame

            0 Too large frames

            0 Good (1 coll) frames

            0 Good (>1 coll) frames

Hall of Fame Super Gold

WS-C3560-48PS port going up and down

Possibly your NIC is faulty.

I can see ONE-WAY traffic. Switch port is sending data downstream but downstream client is not responding. 

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