serial up line protocol down

Discussion in 'Cisco' started by jjbo, Jun 24, 2008.

  1. jjbo

    jjbo

    Joined:
    Jun 3, 2008
    Messages:
    1
    Need help on finding a reason for interface down protocol down...
    Did a loop back test with hdlc on the circuit but didn't get it looped.

    Please let me know if you have any thoughts.

    This router has got an integerated csu dsu, all the pinouts (dcd rts cts dsr dtr) are up, still the interface is up and protocol is down.

    Cisco#show interf ser 1/0
    Serial1/0 is up, line protocol is down
    Hardware is QUICC with integrated T1 CSU/DSU
    Description:
    Internet address is a.b.c.d/30
    MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
    reliability 255/255, txload 1/255, rxload 1/255
    Encapsulation PPP, loopback set
    Keepalive set (10 sec)
    LCP REQsent
    Closed: IPCP, CDPCP
    Last input 14:41:56, output 00:00:00, output hang never
    Last clearing of "show interface" counters 00:06:25
    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
    1 input errors, 0 CRC, 0 frame, 0 overrun, 1 ignored, 0 abort
    81 packets output, 1134 bytes, 1 underruns
    1 output errors, 0 collisions, 20 interface resets
    0 output buffer failures, 0 output buffers swapped out
    2 carrier transitions
    DCD=up DSR=up DTR=up RTS=up CTS=up

    ====================================================
    debug serial interface

    Jun 24 13:50:21.086 UTC: Serial1/1: attempting to restart
    Jun 24 13:50:46.454 UTC: Serial1/0: attempting to restart
    Jun 24 13:50:51.094 UTC: Serial1/1: attempting to restart
    Jun 24 13:51:16.455 UTC: Serial1/0: attempting to restart

    ==========================================
    sh controllers serial 1/0
    Interface Serial1/0
    Hardware is Quicc 68360 with Integrated FT1 CSU/DSU module
    TX clock detected.
    idb at 0x61D3DF9C, driver data structure at 0x61D43EF8
    WIC interrupt reg = F
    SCC Registers:
    General [GSMR]=0x2:0x00000930, Protocol-specific [PSMR]=0x8
    Events [SCCE]=0x0000, Mask [SCCM]=0x001F, Status [SCCS]=0x0003
    Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
    Interrupt Registers:
    Config [CICR]=0x00C9CF00, Pending [CIPR]=0x00000002
    Mask [CIMR]=0xE0004400, In-srv [CISR]=0x00000000
    SDMA Registers:
    [SDSR]=0x00, [SDAR]=0x03B8F3E8, [SDCR]=0x0772
    Command register [CR]=0x640
    Port A [PADIR]=0x0000, [PAPAR]=0xFFFF
    [PAODR]=0x0000, [PADAT]=0xACFB
    Port B [PBDIR]=0x0013FE, [PBPAR]=0x00000E
    [PBODR]=0x000000, [PBDAT]=0x03CC5C
    Port C [PCDIR]=0x0002, [PCPAR]=0x000C
    [PCSO]=0x00A0, [PCDAT]=0x0FCD, [PCINT]=0x0001
    Receive Ring
    rmd(3D010420): status 9000 length 60C address 3B380A4
    rmd(3D010428): status 9000 length 60C address 3B39AA4
    rmd(3D010430): status 9000 length 60C address 3B3A124
    rmd(3D010438): status 9000 length 60C address 3B3A7A4
    rmd(3D010440): status 9000 length 60C address 3B3AE24
    rmd(3D010448): status 9000 length 60C address 3B39424
    rmd(3D010450): status B000 length 60C address 3B3B4A4
    Transmit Ring
    tmd(3D010458): status 5C00 length 44 address 3B8F3D4
    tmd(3D010460): status 5C00 length 18 address 3B8F3D4
    tmd(3D010468): status 5C00 length 18 address 3B911D4
    tmd(3D010470): status 5C00 length 44 address 3B911D4
    tmd(3D010478): status 0 length 18 address 0
    tmd(3D010480): status 0 length E address 0
    tmd(3D010488): status 2000 length E address 0

    SCC GENERAL PARAMETER RAM (at 0x3D010C00)
    Rx BD Base [RBASE]=0x420, Fn Code [RFCR]=0x18
    Tx BD Base [TBASE]=0x458, Fn Code [TFCR]=0x18
    Max Rx Buff Len [MRBLR]=1548
    Rx State [RSTATE]=0x0, BD Ptr [RBPTR]=0x420
    Tx State [TSTATE]=0x18000348, BD Ptr [TBPTR]=0x478

    SCC HDLC PARAMETER RAM (at 0x3D010C38)
    CRC Preset [C_PRES]=0xFFFF, Mask [C_MASK]=0xF0B8
    Errors: CRC [CRCEC]=0, Aborts [ABTSC]=0, Discards [DISFC]=0
    Nonmatch Addr Cntr [NMARC]=0
    Retry Count [RETRC]=0
    Max Frame Length [MFLR]=1608
    Rx Int Threshold [RFTHR]=0, Frame Cnt [RFCNT]=65532
    User-defined Address 0000/0000/0000/0000
    User-defined Address Mask 0x0000


    buffer size 1524
    QUICC SCC specific errors:
    806954 input aborts on receiving flag sequence
    0 throttles, 0 enables
    0 overruns
    1 transmitter underruns
    0 transmitter CTS losts

    ================================
    Issue 2
    ================================

    Same as above with a slight difference.

    Its running clean while testing a hard loopback plug on it, no packet drops, no errors but its flapping in every 2 hrs.



    Thanks in advance...

    JJ
     
    Last edited: Jun 24, 2008
    jjbo, Jun 24, 2008
    #1
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