в 9 порт воткнут телесин 8326
ни с того ни с сего начинает "прыгать" интерфейс

cat#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(22)EA7, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2006 by cisco Systems, Inc.
Compiled Fri 27-Jan-06 21:19 by antonino
Image text-base: 0x80010000, data-base: 0x8056A000

ROM: Bootstrap program is C2950 boot loader

cat uptime is 6 minutes
System returned to ROM by power-on
System image file is "flash:c2950-i6q4l2-mz.121-22.EA7.bin"

cisco WS-C2950-12 (RC32300) processor (revision B0) with 21004K bytes of memory.
Processor board ID FAB0540Y346
Last reset from system-reset
Running Standard Image
12 FastEthernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:07:84:34:68:00
Motherboard assembly number: 73-5782-08
Power supply part number: 34-0965-01
Motherboard serial number: FAB054073RZ
Power supply serial number: PHI053200XL
Model revision number: B0
Model number: WS-C2950-12
System serial number: FAB0540Y346
Configuration register is 0xF

FastEthernet0/9 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0007.8434.6809 (bia 0007.8434.6809)
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
     reliability 255/255, txload 3/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 100BaseTX
  input flow-control is unsupported 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 105000 bits/sec, 91 packets/sec
  5 minute output rate 1214000 bits/sec, 126 packets/sec
     30284 packets input, 4856762 bytes, 71 no buffer
     Received 348 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 71 ignored
     0 watchdog, 4 multicast, 0 pause input
     0 input packets with dribble condition detected
     45413 packets output, 58729939 bytes, 0 underruns
     0 output errors, 0 collisions, 2 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

18.04.2006 0:40    Local7.Error    296: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 0:40    Local7.Notice    297: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 0:40    Local7.Error    298: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 0:40    Local7.Notice    299: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 1:43    Local7.Error    300: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 1:43    Local7.Notice    301: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 1:54    Local7.Error    302: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 1:54    Local7.Notice    303: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 2:02    Local7.Error    304: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 2:02    Local7.Notice    305: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 2:02    Local7.Error    306: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 2:02    Local7.Notice    307: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 3:07    Local7.Error    308: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 3:07    Local7.Notice    309: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 3:07    Local7.Error    310: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 3:07    Local7.Notice    311: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 3:07    Local7.Error    312: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 3:07    Local7.Notice    313: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 3:07    Local7.Error    314: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 3:07    Local7.Notice    315: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 3:08    Local7.Error    316: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 3:08    Local7.Notice    317: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 3:08    Local7.Error    318: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 3:08    Local7.Notice    319: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 3:08    Local7.Error    320: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 3:08    Local7.Notice    321: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 3:08    Local7.Error    322: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 3:08    Local7.Notice    323: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 3:09    Local7.Error    324: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 3:09    Local7.Notice    325: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 3:09    Local7.Error    326: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 3:09    Local7.Notice    327: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 6:09    Local7.Error    328: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 6:09    Local7.Notice    329: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 6:09    Local7.Error    330: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 6:09    Local7.Notice    331: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 7:52    Local7.Error    332: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 7:52    Local7.Notice    333: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 7:52    Local7.Error    334: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 7:52    Local7.Notice    335: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 7:52    Local7.Error    336: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 7:53    Local7.Notice    337: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 7:53    Local7.Error    338: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 7:53    Local7.Notice    339: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 7:53    Local7.Error    340: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 7:53    Local7.Notice    341: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 7:53    Local7.Error    342: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 7:53    Local7.Error    343: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 7:53    Local7.Error    344: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 7:53    Local7.Notice    345: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 8:52    Local7.Error    346: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 8:52    Local7.Notice    347: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 8:52    Local7.Error    348: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 8:52    Local7.Notice    349: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 10:17    Local7.Error    350: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 10:17    Local7.Notice    351: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 10:17    Local7.Error    352: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 10:17    Local7.Notice    353: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 11:17    Local7.Error    354: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 11:17    Local7.Notice    355: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 11:17    Local7.Error    356: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 11:17    Local7.Notice    357: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 12:56    Local7.Error    358: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 12:56    Local7.Notice    359: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 12:56    Local7.Error    360: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 12:56    Local7.Notice    361: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 12:59    Local7.Error    362: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 12:59    Local7.Notice    363: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 12:59    Local7.Error    364: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 12:59    Local7.Notice    365: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 13:24    Local7.Error    23: 9w0d: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to down
18.04.2006 14:14    Local7.Error    366: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 14:14    Local7.Notice    367: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 14:16    Local7.Error    368: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 14:16    Local7.Notice    369: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 14:16    Local7.Error    370: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 14:16    Local7.Notice    371: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 14:16    Local7.Error    372: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 14:16    Local7.Notice    373: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
18.04.2006 14:16    Local7.Error    374: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to down
18.04.2006 14:16    Local7.Notice    375: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to down
18.04.2006 14:16    Local7.Error    376: 34w2d: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
18.04.2006 14:16    Local7.Notice    377: 34w2d: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up