Serial port's active

From: Tom Young (gitsyoung@yahoo.co.jp)
Date: Wed Nov 13 2002 - 11:31:09 GMT-3


Hi,group

    My router's serial port's status is double down, but
the SNA is ok, tested from HQ. Why ???

cisco#sh int s0/0
Serial0/0 is down, line protocol is down
  Hardware is PowerQUICC Serial
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation SDLC, loopback not set
    Router link station role: PRIMARY (DCE)
    Router link station metrics:
      slow-poll 10 seconds
      T1 (reply time out) 3000 milliseconds
      N1 (max frame size) 12016 bits
      N2 (retry count) 20
      poll-pause-timer 10 milliseconds
      poll-limit-value 1
      k (windowsize) 7
      modulo 8
      sdlc vmac: 4000.0594.00--
  sdlc addr 02 state is DISCONNECT
      cls_state is CLS_STN_CLOSED
      VS 0, VR 0, Remote VR 0, Current retransmit count 0
      Hold queue: 0/200 IFRAMEs 0/0
      TESTs 0/0 XIDs 0/0, DMs 0/0 FRMRs 0/0
      RNRs 0/0 SNRMs 0/0 DISC/RDs 0/0 REJs 0/0
      Poll: clear, Poll count: 0, ready for poll, chain:
02/02
  Last input never, output never, output hang never
  Last clearing of "show interface" counters 01:13:46
  Queueing strategy: fifo
  Output queue 0/40, 0 drops; input queue 0/75, 0 drops
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 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
     0 packets output, 0 bytes, 0 underruns
     0 output errors, 0 collisions, 126 interface resets
     0 output buffer failures, 0 output buffers swapped
out
     0 carrier transitions
     DCD=up DSR=up DTR=down RTS=down CTS=up
 



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