cisco路由器和专线问题

Serial1/0:0 is up, line protocol is up  
Hardware is DSX1                          
Internet address is 192.18.18.1/24
MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
    reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
Listen: CDPCP
Open: IPCP, loopback not set
Last input 00:00:14, output 00:00:01, output hang never
Last clearing of "show interface" counters 22:23:24
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
    Conversations  0/2/256 (active/max active/max total)
    Reserved Conversations 0/0 (allocated/max allocated)
    Available Bandwidth 1488 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
    13063 packets input, 401135 bytes, 0 no buffer
    Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
    13003 packets output, 337492 bytes, 0 underruns
    0 output errors, 0 collisions, 0 interface resets
    0 output buffer failures, 0 output buffers swapped out
    0 carrier transitions
Timeslot(s) Used:1-31, Transmitter delay is 0 flags

以上是13：15左右   查看接口的统计信息。   
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以下是15:21 左右   查看接口的统计信息。   
junbao-r#show int s 1/0:0                                       
Serial1/0:0 is up, line protocol is up
  Hardware is DSX1
  Internet address is 192.18.18.1/24
  MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, LCP Open
  Listen: CDPCP
  Open: IPCP, loopback not set
  Last input 00:00:11, output 00:00:11, output hang never
  Last clearing of "show interface" counters 1d00h
  Input queue: 0/75/119/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: weighted fair
  Output queue: 0/1000/64/0 (size/max total/threshold/drops)
     Conversations  0/2/256 (active/max active/max total)
     Reserved Conversations 0/0 (allocated/max allocated)
     Available Bandwidth 1488 kilobits/sec
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     14391 packets input, 446141 bytes, 0 no buffer
     Received 0 broadcasts, 50 runts, 0 giants, 0 throttles
     119 input errors, 53 CRC, 66 frame, 0 overrun, 0 ignored, 31 abort
     14308 packets output, 376036 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     0 output buffer failures, 0 output buffers swapped out
     6 carrier transitions
  Timeslot(s) Used:1-31, Transmitter delay is 0 flags

这个数据显示严重吗？ 一般是什么问题引起的？