Есть каталист WS-C3750-24TS и на его 12 порт воткнут Vmux-110/E1 (Это мультиплексор)
Порт периодически падает из-за падения езернет порта VMUX . И кажется а логах что то не то. Помогите разобратся.

001326: Mar 28 09:01:44: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth
ernet1/0/12, changed state to down
001327: Mar 28 09:01:46: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth
ernet1/0/12, changed state to up
001328: Mar 28 09:02:23: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth
ernet1/0/12, changed state to down
001329: Mar 28 09:02:24: %LINK-3-UPDOWN: Interface FastEthernet1/0/12, changed s
tate to down
001330: Mar 28 09:02:26: %LINK-3-UPDOWN: Interface FastEthernet1/0/12, changed s
tate to up
001331: Mar 28 09:02:27: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth
ernet1/0/12, changed state to up

sh int fa1/0/12
FastEthernet1/0/12 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 000f.23c4.e90e (bia 000f.23c4.e90e)
  Description: Na VMUX
  MTU 1500 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 2/255, rxload 2/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 10Mb/s
  input flow-control is off, output flow-control is off
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:01, output 00:00:02, 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 90000 bits/sec, 58 packets/sec
  5 minute output rate 82000 bits/sec, 52 packets/sec
     20764484 packets input, 4129768292 bytes, 0 no buffer
     Received 2464117 broadcasts (0 multicast)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 242952 multicast, 0 pause input
     0 input packets with dribble condition detected
     19405524 packets output, 3678797996 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 fastEthernet 1/0/12

  Transmit FastEthernet1/0/12           Receive
  33199544 Bytes                      31901828 Bytes
    130962 Unicast frames               143423 Unicast frames
       600 Multicast frames               1631 Multicast frames
      8069 Broadcast frames              16140 Broadcast frames
         0 Too old frames             30326649 Unicast bytes
         0 Deferred frames              125389 Multicast bytes
         0 MTU exceeded frames         1449790 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            32885 Minimum size frames
         0 8 collision frames            77761 65 to 127 byte frames
         0 9 collision frames            12457 128 to 255 byte frames
         0 10 collision frames           13289 256 to 511 byte frames
         0 11 collision frames           24802 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
     26629 64 byte frames                    0 Valid frames, too small
     62569 127 byte frames
     17566 255 byte frames                   0 Too old frames
     12850 511 byte frames                   0 Valid oversize frames
     11184 1023 byte frames                  0 System FCS error frames
      8833 1518 byte frames                  0 RxPortFifoFull drop frame
         0 Too large frames
         0 Good (1 coll) frames
         0 Good (>1 coll) frames
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