[c-nsp] Line Protocol going down

[Scott Voll]

I have a 2821(15.1(3)T2) connected to a 3560(12.2(55)SE3) and recently i
have had the Line protocol between the two go down.

The two are connected on a dot1q truck.

Sh int on the router:

GigabitEthernet0/0 is up, line protocol is up
  Hardware is MV96340 Ethernet, address is 001b.d470.8fa8 (bia
001b.d470.8fa8)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation 802.1Q Virtual LAN, Vlan ID  1., loopback not set
  Keepalive set (10 sec)
  Full Duplex, 100Mbps, media type is T
  output flow-control is XON, input flow-control is XON
  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 13w2d
  Input queue: 0/75/36/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 55000 bits/sec, 28 packets/sec
  5 minute output rate 143000 bits/sec, 71 packets/sec
     1805047870 packets input, 3205641174 bytes, 1 no buffer
     Received 14405186 broadcasts (3085682 IP multicasts)
     14 runts, 0 giants, 22 throttles
     5895 input errors, 49 CRC, 1 frame, 0 overrun, 5831 ignored
     0 watchdog, 0 multicast, 0 pause input
     1591540763 packets output, 638093162 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     269848 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     50 lost carrier, 0 no carrier, 10 pause output
     0 output buffer failures, 0 output buffers swapped out

sh int on the switch:

FastEthernet0/1 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 0017.94ab.8103 (bia 0017.94ab.8103)
  Description: Router 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 00:00:34, 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: 641849
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 127000 bits/sec, 70 packets/sec
  5 minute output rate 87000 bits/sec, 32 packets/sec
     841389935 packets input, 363402231378 bytes, 0 no buffer
     Received 382643887 broadcasts (382078407 multicasts)
     7 runts, 0 giants, 0 throttles
     7 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 382078407 multicast, 18 pause input
     0 input packets with dribble condition detected
     1827233350 packets output, 2184911648917 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

The are directly connected with a 5 foot patch cable.

What are runts?  pause inputs?  unknown protocol drops?

Since I'm seeing Inputs errors and CRC's is this a bad patch cable?  This
Router and switch when setup did not get hard set for speed and duplex.....
could that be the issue?

TIA

Scott