T1 Serial Problems

Discussion in 'Cisco' started by John, Sep 18, 2009.

  1. John

    John Guest

    I've installed two cisco 1841 routers with csu/dsu cards in them to
    support
    a closed circuit t1. The configuration for the serial port is as
    follows:

    Router A:
    interface serial 0/0/0
    ip address 192.168.1.1 255.255.255.0
    ip access-group 101 in
    ip access-group 102 out
    encapsulation ppp
    service-module t1 clock source internal
    service-module t1 timeslots 1-24
    crypto map myMap


    Router B:
    interface serial 0/0/0
    ip address 192.168.1.2 255.255.255.0
    ip access-group 101 in
    ip access-group 102 out
    encapsulation ppp
    service-module t1 cablelength short 220ft
    service-module t1 timeslots 1-24
    cypto map myMap


    Everything seems to work fine, except the serial connection goes down
    for
    30secs about every 30min. We had the ISP out there to test the line
    and
    they tried to sync up the oscillators with some magical machine, and
    that
    helped the timing a little bit, but we still see the problem.

    Our guess at this point is that there is a hardware problem, and we are
    considering swapping out both routers. Does anybody have any other
    ideas at
    this point that I can try? Or even commands I can use to test the line
    and
    narrow down the problem? I tried following the Cisco troubleshooting
    guide
    for t1 lines, but maybe I missed something.

    Also, Router B is connected from the terminal to the serial port with a
    cable that is roughly 140ft. Perhaps the cable is messing things up?

    Thanks.

    --
     
    John, Sep 18, 2009
    #1
    1. Advertisements

  2. Hi John, what kind of card are you using ?
    - What does 'sh controller t1 0/0/0' look like, taken 4 times every 10
    mins (ie: across a failure), do your slip seconds increment?
    A hard loop on both sides will tell you if this is a hardware problem
    (assuming this is already done). I've found it helps if you loop at
    the router, then loop at the CSU/DSU (ie: test the length of your
    cable). Then loop at the remote CSU/DSU (test the full circuit). This
    is quite invasive testing tbh...

    Keep an eye on the counters from 'sh controller t1 0/0/0' to see
    what's incrementing. Also keep an eye on the serial interface counters
    also...
    Could be, see above, looping the circuit at various points on the
    line, usually helps narrow down what introduces your issue.
     
    Ruairi Carroll, Sep 21, 2009
    #2
    1. Advertisements

  3. John

    Thrill5 Guest

    I'm leaning towards a clocking issue but I have no idea what a "closed
    circuit T1" is, never heard of that before. Do you mean that this is a
    point-to-point T1 between two locations? If it is, then clocking should be
    external (or recovered) on both ends. The carrier provides the clocking on
    a T1. You have one side as internal, and the other is external. The
    internal side is getting out of sync every 30 minutes and the line is going
    down.
     
    Thrill5, Sep 22, 2009
    #3
  4. John

    John Guest

    Hey guys.

    Thanks for the input. The "closed circuit T1" that I have
    is a point-to-point connection. The ISP told us to set
    1 side as internal and one side to line (just like a back-
    to-back configuration) because they have nothing on the
    line.

    If I do a show controllers ..., the hardware is as follows:
    Hardware is GT96K with integrated T1 CSU/DSU. This is true
    on both routers.

    If I do a show interfaces serial 0/0/0, the input errors, CRC, frame,
    and overrun erros are also increasing.

    Sorry for the late reply, but I'm back in the office now. I can try
    more later. Thanks again for the reply. Any more ideas?



    --
     
    John, Sep 22, 2009
    #4
  5. I find "nothing on the line" claim highly suspicious. The only time you
    would run into such situation is when T1 are provisioned over plain
    copper runs directly to the same central office from both locations. In
    every other case there is something on the line and this something does
    provide clocking.
    Have you tried to set both ends to "line"?

    Regards,
    Andrey.
     
    Andrey Tarasov, Sep 22, 2009
    #5
  6. John

    John Guest

    I should probably also mention that I initially had them
    both set to line (instead of 1 at internal) and I saw the
    same problem.

    Thanks again,
    -- John


    --
     
    John, Sep 22, 2009
    #6
  7. John

    John Guest

    Thanks Andrey,

    We all thought it was weird too when he set it up. In fact,
    everyone I talk to (and I'm sure everyone reading this)
    thought it sounded weird when they told us to do it.

    However, I had them both set to line for several months
    and we saw the same problems. The ISP came out with
    some machine and was able to sync up the oscillators in the
    routers, and that seemed to help out, but we still saw
    the same problems. So we started blaming either the cisco
    hardware or the long cable on the other end.

    Our next plan is to replace the cisco hardware with some
    2600 routers, but we would take the CSU/DSU module out of
    our existing 1800 series routers and place it in the 2600
    series.


    --
     
    John, Sep 22, 2009
    #7
  8. John

    Techno_Guy Guest

    Except for the fact that I dont believe the CSU wics in the 1800 and
    the 2600 are compatible. I could be wrong. You should check Cisco's
    site or call your Cisco equipment provider to confirm.

    Are you getting increasing counters in "loss of frame". This could be
    bad wics or bad cables if you are.
     
    Techno_Guy, Sep 23, 2009
    #8
  9. Long cable run can indeed be the problem. Is it proper T1 type of cable
    or just Cat5 or something similar? Any fluorescent lights along it?

    Troubleshooting is really straightforward but require some downtime. You
    will need hardware loopback - just normal RJ45 plug with pin 1 connected
    to 4 and 2 to 5 (if my memory is correct). Disconnect the cable and plug
    loopback in its place, run extended ping with 0x00, 0xFF, 0x4040 and
    0x8080 patterns from remote router. Check for errors - if line is clean,
    repeat with cable in place and loopback on the router.

    Regards,
    Andrey.
     
    Andrey Tarasov, Sep 23, 2009
    #9
  10. John

    bod43 Guest

    The sh controllers also displays detailed error information
    not available otherwise.

    Please post entire sh controllers se x/x. (sorry I don't
    have one here to check exact syntax) after the line
    has been up for some hours. Stats are collected
    every 15 minutes and kept for some hours - if I recall
    correctly.

    I have dealt with only a few cisco serial cards (<100)
    but I have not seen a broken one yet.

    loopback testing is the way to go but you need to remember
    that you need a clock on the segment under test.

    Some cards can be conrifured to loop internally or
    externally too.

    http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a754b.shtml
    "Loopback Tests for T1/56K Lines"

    Might give you some ideas.
     
    bod43, Sep 23, 2009
    #10
  11. John

    John Guest

    Thanks again guys,

    My connection from where I am is currently down with my T1
    connection, and I don't think it will be up until tomorrow.
    When it comes up tomorrow, I'll do all of the suggested
    commands (sh controllers se x/x, etc.), and let everyone
    know what's up.

    In the meantime, I'm pretty sure the long cable on the
    other end is just cat5 (I think a straight through going
    from the smartjack to the csu/dsu card).
    Anyway, I tried searching online for some proper T1 cable
    (what exactly is proper t1 cable? from what I gather, it
    looks like cat3?). I really like that suggestion and would
    like replacing the cable with proper t1 cable. does anybody
    have a good site I can go to in order to buy such cable?
    I found a couple, but want to make sure I buy the right
    thing. It looks like I need RJ48 cable (does this cable
    have an RJ45 connector and the RJ48 is just the pin specs?).

    I'll post more when the connection is back up. Thanks again.


    --
     
    John, Sep 23, 2009
    #11
  12. Proper T1 cable has two individually shielded pairs. Here is the link to
    one of the suppliers -

    http://www.stonewallcable.com/product.asp?dept_id=23&pf_id=SC-7246

    Regards,
    Andrey.
     
    Andrey Tarasov, Sep 23, 2009
    #12
  13. John

    John Guest

    Thanks for the link Andrey. What's the difference between a proper t1 line
    and a regular cat5 cable? Is the T1 cable basically a cat3 cable with less
    twist along the line?
     
    John, Sep 23, 2009
    #13
  14. John

    John Guest

    The sh controllers also displays detailed error information
    not available otherwise.

    Please post entire sh controllers se x/x. (sorry I don't
    have one here to check exact syntax) after the line
    has been up for some hours. Stats are collected
    every 15 minutes and kept for some hours - if I recall
    correctly.

    I have dealt with only a few cisco serial cards (<100)
    but I have not seen a broken one yet.

    loopback testing is the way to go but you need to remember
    that you need a clock on the segment under test.

    Some cards can be conrifured to loop internally or
    externally too.

    http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00800a754b.shtml
    "Loopback Tests for T1/56K Lines"

    Might give you some ideas.

    ----------------------------------------------------------------------------
    I managed to get my VPN back up today. Here's the output of the show
    controllers ...
    Does this output show anything that gives clues to the problem? Thanks
    again.

    RouterA#show controllers serial 0/0/0
    Interface Serial0/0/0
    Hardware is GT96K with Integrated FT1 CSU/DSU module
    TX and RX clocks detected.
    idb at 0x62E5E740, driver data structure at 0x62E65E5C
    wic_info 0x62E66460
    Physical Port 0, SCC Num 0
    MPSC Registers:
    MMCR_L=0x000304C0, MMCR_H=0x00000000, MPCR=0x00000000
    CHR1=0x00FE007E, CHR2=0x00000000, CHR3=0x0000064A, CHR4=0x00000000
    CHR5=0x00000000, CHR6=0x00000000, CHR7=0x00000000, CHR8=0x00000000
    CHR9=0x00000000, CHR10=0x00003008
    SDMA Registers:
    SDC=0x00002201, SDCM=0x00000080, SGC=0x0000C000
    CRDP=0x074BD040, CTDP=0x074BD480, FTDB=0x074BD480
    Main Routing Register=0x0003FFF8 BRG Conf Register=0x00480000
    Rx Clk Routing Register=0x76543218 Tx Clk Routing Register=0x76543219
    GPP Registers:
    Conf=0x30002 , Io=0x64050 , Data=0x7F1ABFA9, Level=0x180000
    Conf0=0x30002 , Io0=0x64050 , Data0=0x7F1ABFA9, Level0=0x180000
    1245698 input aborts on receiving flag sequence
    0 throttles, 0 enables
    401789 overruns
    0 transmitter underruns
    0 transmitter CTS losts
    20859062 rxintr, 27393207 txintr, 0 rxerr, 0 txerr
    41228186 mpsc_rx, 0 mpsc_rxerr, 11599 mpsc_rlsc, 919163 mpsc_rhnt, 40405244
    mpsc
    _rfsc
    4123 mpsc_rcsc, 0 mpsc_rovr, 0 mpsc_rcdl, 0 mpsc_rckg, 0 mpsc_bper
    0 mpsc_txerr, 17308568 mpsc_teidl, 0 mpsc_tudr, 0 mpsc_tctsl, 0 mpsc_tckg
    0 sdma_rx_sf, 1067 sdma_rx_mfl, 401789 sdma_rx_or, 1245698 sdma_rx_abr,
    707762 s
    dma_rx_no
    0 sdma_rx_de, 0 sdma_rx_cdl, 1655935 sdma_rx_ce, 0 sdma_tx_rl, 0 sdma_tx_ur,
    0 s
    dma_tx_ctsl
    0 sdma_rx_reserr, 0 sdma_tx_reserr
    0 rx_bogus_pkts, rx_bogus_flag FALSE
    0 sdma_tx_ur_processed

    tx_limited = 1(2), errata19 count1 - 0, count2 - 0
    Receive Ring
    rxr head (23)(0x074BD050), rxr tail (0)(0x074BCEE0)
    rmd(74BCEE0): nbd 74BCEF0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C5FA0
    rmd(74BCEF0): nbd 74BCF00 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BF9A0
    rmd(74BCF00): nbd 74BCF10 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C7920
    rmd(74BCF10): nbd 74BCF20 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C4620
    rmd(74BCF20): nbd 74BCF30 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C1980
    rmd(74BCF30): nbd 74BCF40 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C3FC0
    rmd(74BCF40): nbd 74BCF50 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C52E0
    rmd(74BCF50): nbd 74BCF60 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74CA5C0
    rmd(74BCF60): nbd 74BCF70 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C6C60
    rmd(74BCF70): nbd 74BCF80 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C0CC0
    rmd(74BCF80): nbd 74BCF90 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C0660
    rmd(74BCF90): nbd 74BCFA0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BE020
    rmd(74BCFA0): nbd 74BCFB0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C5940
    rmd(74BCFB0): nbd 74BCFC0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C2CA0
    rmd(74BCFC0): nbd 74BCFD0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BECE0
    rmd(74BCFD0): nbd 74BCFE0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C1320
    rmd(74BCFE0): nbd 74BCFF0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C6600
    rmd(74BCFF0): nbd 74BD000 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C0000
    rmd(74BD000): nbd 74BD010 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C8C40
    rmd(74BD010): nbd 74BD020 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C72C0
    rmd(74BD020): nbd 74BD030 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C3960
    rmd(74BD030): nbd 74BD040 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C9F60
    rmd(74BD040): nbd 74BD050 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C92A0
    rmd(74BD050): nbd 74BD060 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C9900
    rmd(74BD060): nbd 74BD070 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BE680
    rmd(74BD070): nbd 74BD080 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C2640
    rmd(74BD080): nbd 74BD090 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C85E0
    rmd(74BD090): nbd 74BD0A0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C1FE0
    rmd(74BD0A0): nbd 74BD0B0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BF340
    rmd(74BD0B0): nbd 74BD0C0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C7F80
    rmd(74BD0C0): nbd 74BD0D0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C3300
    rmd(74BD0D0): nbd 74BCEE0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74CAC20
    Transmit Ring
    txr head (57)(0x074BD4B0), txr tail (57)(0x074BD4B0)
    tmd(74BD120): nbd 74BD130 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C4620
    tmd(74BD130): nbd 74BD140 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD140): nbd 74BD150 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD150): nbd 74BD160 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD160): nbd 74BD170 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD170): nbd 74BD180 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD180): nbd 74BD190 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD190): nbd 74BD1A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD1A0): nbd 74BD1B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7100E94
    tmd(74BD1B0): nbd 74BD1C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD1C0): nbd 74BD1D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD1D0): nbd 74BD1E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD1E0): nbd 74BD1F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103A30
    tmd(74BD1F0): nbd 74BD200 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD200): nbd 74BD210 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD210): nbd 74BD220 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C0000
    tmd(74BD220): nbd 74BD230 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71036F0
    tmd(74BD230): nbd 74BD240 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD240): nbd 74BD250 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD250): nbd 74BD260 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD260): nbd 74BD270 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD270): nbd 74BD280 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD280): nbd 74BD290 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD290): nbd 74BD2A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD2A0): nbd 74BD2B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D7FB4
    tmd(74BD2B0): nbd 74BD2C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD2C0): nbd 74BD2D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD2D0): nbd 74BD2E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD2E0): nbd 74BD2F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD2F0): nbd 74BD300 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD300): nbd 74BD310 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD310): nbd 74BD320 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C5FA0
    tmd(74BD320): nbd 74BD330 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103A30
    tmd(74BD330): nbd 74BD340 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD340): nbd 74BD350 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD350): nbd 74BD360 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD360): nbd 74BD370 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD370): nbd 74BD380 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD380): nbd 74BD390 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71000D4
    tmd(74BD390): nbd 74BD3A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD3A0): nbd 74BD3B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD3B0): nbd 74BD3C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD3C0): nbd 74BD3D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD3D0): nbd 74BD3E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD3E0): nbd 74BD3F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD3F0): nbd 74BD400 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD400): nbd 74BD410 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9B10
    tmd(74BD410): nbd 74BD420 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C6600
    tmd(74BD420): nbd 74BD430 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD430): nbd 74BD440 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD440): nbd 74BD450 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD450): nbd 74BD460 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD460): nbd 74BD470 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD470): nbd 74BD480 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71036F0
    tmd(74BD480): nbd 74BD490 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7101D94
    tmd(74BD490): nbd 74BD4A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD4A0): nbd 74BD4B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA190
    tmd(74BD4B0): nbd 74BD4C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD4C0): nbd 74BD4D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD4D0): nbd 74BD4E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD4E0): nbd 74BD4F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD4F0): nbd 74BD500 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD500): nbd 74BD510 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E3B34
    tmd(74BD510): nbd 74BD520 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD520): nbd 74BD530 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C5FA0
    tmd(74BD530): nbd 74BD540 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA190
    tmd(74BD540): nbd 74BD550 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD550): nbd 74BD560 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD560): nbd 74BD570 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD570): nbd 74BD580 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD580): nbd 74BD590 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD590): nbd 74BD5A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD5A0): nbd 74BD5B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD5B0): nbd 74BD5C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD5C0): nbd 74BD5D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD5D0): nbd 74BD5E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D8234
    tmd(74BD5E0): nbd 74BD5F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9B10
    tmd(74BD5F0): nbd 74BD600 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD600): nbd 74BD610 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD610): nbd 74BD620 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD620): nbd 74BD630 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD630): nbd 74BD640 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD640): nbd 74BD650 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71036F0
    tmd(74BD650): nbd 74BD660 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7101394
    tmd(74BD660): nbd 74BD670 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD670): nbd 74BD680 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD680): nbd 74BD690 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD690): nbd 74BD6A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD6A0): nbd 74BD6B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD6B0): nbd 74BD6C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD6C0): nbd 74BD6D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD6D0): nbd 74BD6E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD6E0): nbd 74BD6F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD6F0): nbd 74BD700 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD700): nbd 74BD710 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD710): nbd 74BD720 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD720): nbd 74BD730 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD730): nbd 74BD740 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD740): nbd 74BD750 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD750): nbd 74BD760 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA190
    tmd(74BD760): nbd 74BD770 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD770): nbd 74BD780 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD780): nbd 74BD790 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD790): nbd 74BD7A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD7A0): nbd 74BD7B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD7B0): nbd 74BD7C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD7C0): nbd 74BD7D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD7D0): nbd 74BD7E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD7E0): nbd 74BD7F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD7F0): nbd 74BD800 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD800): nbd 74BD810 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9B10
    tmd(74BD810): nbd 74BD820 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C1980
    tmd(74BD820): nbd 74BD830 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD830): nbd 74BD840 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD840): nbd 74BD850 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD850): nbd 74BD860 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD860): nbd 74BD870 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD870): nbd 74BD880 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD880): nbd 74BD890 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD890): nbd 74BD8A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD8A0): nbd 74BD8B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD8B0): nbd 74BD8C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA190
    tmd(74BD8C0): nbd 74BD8D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103A30
    tmd(74BD8D0): nbd 74BD8E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD8E0): nbd 74BD8F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E6B70
    tmd(74BD8F0): nbd 74BD900 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD900): nbd 74BD910 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD910): nbd 74BD120 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0

    buffer size 1524



    --------------------------------------------------------------------------------


    RouterB#show controllers serial 0/0/0
    Interface Serial0/0/0
    Hardware is GT96K with Integrated FT1 CSU/DSU module
    TX and RX clocks detected.
    idb at 0x62F09880, driver data structure at 0x62F10F9C
    wic_info 0x62F115A0
    Physical Port 0, SCC Num 0
    MPSC Registers:
    MMCR_L=0x000304C0, MMCR_H=0x00000000, MPCR=0x00000000
    CHR1=0x00FE007E, CHR2=0x00000000, CHR3=0x0000064A, CHR4=0x00000000
    CHR5=0x00000000, CHR6=0x00000000, CHR7=0x00000000, CHR8=0x00000000
    CHR9=0x00000000, CHR10=0x00003008
    SDMA Registers:
    SDC=0x00002201, SDCM=0x00000080, SGC=0x0000C000
    CRDP=0x074BD0D0, CTDP=0x074BD630, FTDB=0x074BD630
    Main Routing Register=0x0003FFF8 BRG Conf Register=0x00480000
    Rx Clk Routing Register=0x76543218 Tx Clk Routing Register=0x76543219
    GPP Registers:
    Conf=0x30002 , Io=0x64050 , Data=0x7F5BBFAB, Level=0x180000
    Conf0=0x30002 , Io0=0x64050 , Data0=0x7F3BBFAB, Level0=0x180000
    908781 input aborts on receiving flag sequence
    0 throttles, 0 enables
    302687 overruns
    0 transmitter underruns
    0 transmitter CTS losts
    29426173 rxintr, 20046063 txintr, 0 rxerr, 0 txerr
    58795697 mpsc_rx, 0 mpsc_rxerr, 7715 mpsc_rlsc, 665019 mpsc_rhnt, 58190219
    mpsc_
    rfsc
    6093 mpsc_rcsc, 0 mpsc_rovr, 0 mpsc_rcdl, 0 mpsc_rckg, 0 mpsc_bper
    0 mpsc_txerr, 17652060 mpsc_teidl, 0 mpsc_tudr, 0 mpsc_tctsl, 0 mpsc_tckg
    0 sdma_rx_sf, 9 sdma_rx_mfl, 302687 sdma_rx_or, 908781 sdma_rx_abr, 527220
    sdma_
    rx_no
    0 sdma_rx_de, 0 sdma_rx_cdl, 1214531 sdma_rx_ce, 0 sdma_tx_rl, 0 sdma_tx_ur,
    0 s
    dma_tx_ctsl
    0 sdma_rx_reserr, 0 sdma_tx_reserr
    0 rx_bogus_pkts, rx_bogus_flag FALSE
    0 sdma_tx_ur_processed

    tx_limited = 1(2), errata19 count1 - 0, count2 - 0
    Receive Ring
    rxr head (0)(0x074BCEE0), rxr tail (0)(0x074BCEE0)
    rmd(74BCEE0): nbd 74BCEF0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C5FA0
    rmd(74BCEF0): nbd 74BCF00 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C3960
    rmd(74BCF00): nbd 74BCF10 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C4C80
    rmd(74BCF10): nbd 74BCF20 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BE680
    rmd(74BCF20): nbd 74BCF30 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C1320
    rmd(74BCF30): nbd 74BCF40 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C0000
    rmd(74BCF40): nbd 74BCF50 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C1980
    rmd(74BCF50): nbd 74BCF60 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C72C0
    rmd(74BCF60): nbd 74BCF70 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C2CA0
    rmd(74BCF70): nbd 74BCF80 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C3300
    rmd(74BCF80): nbd 74BCF90 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BE020
    rmd(74BCF90): nbd 74BCFA0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BF340
    rmd(74BCFA0): nbd 74BCFB0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BECE0
    rmd(74BCFB0): nbd 74BCFC0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C92A0
    rmd(74BCFC0): nbd 74BCFD0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74CA5C0
    rmd(74BCFD0): nbd 74BCFE0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C8C40
    rmd(74BCFE0): nbd 74BCFF0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C3FC0
    rmd(74BCFF0): nbd 74BD000 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BD9C0
    rmd(74BD000): nbd 74BD010 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C1FE0
    rmd(74BD010): nbd 74BD020 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C7920
    rmd(74BD020): nbd 74BD030 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C4620
    rmd(74BD030): nbd 74BD040 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C0660
    rmd(74BD040): nbd 74BD050 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C6C60
    rmd(74BD050): nbd 74BD060 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C9900
    rmd(74BD060): nbd 74BD070 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74BF9A0
    rmd(74BD070): nbd 74BD080 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74CB280
    rmd(74BD080): nbd 74BD090 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C0CC0
    rmd(74BD090): nbd 74BD0A0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C5940
    rmd(74BD0A0): nbd 74BD0B0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C9F60
    rmd(74BD0B0): nbd 74BD0C0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C85E0
    rmd(74BD0C0): nbd 74BD0D0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C7F80
    rmd(74BD0D0): nbd 74BCEE0 cmd_sts 80800000 buf_sz 06000000 buf_ptr 74C6600
    Transmit Ring
    txr head (87)(0x074BD690), txr tail (88)(0x074BD6A0)
    tmd(74BD120): nbd 74BD130 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD130): nbd 74BD140 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD140): nbd 74BD150 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD150): nbd 74BD160 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD160): nbd 74BD170 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD170): nbd 74BD180 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD180): nbd 74BD190 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD190): nbd 74BD1A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD1A0): nbd 74BD1B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD1B0): nbd 74BD1C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD1C0): nbd 74BD1D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD1D0): nbd 74BD1E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD1E0): nbd 74BD1F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD1F0): nbd 74BD200 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD200): nbd 74BD210 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD210): nbd 74BD220 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD220): nbd 74BD230 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD230): nbd 74BD240 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD240): nbd 74BD250 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD250): nbd 74BD260 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD260): nbd 74BD270 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD270): nbd 74BD280 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD280): nbd 74BD290 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DE8D0
    tmd(74BD290): nbd 74BD2A0 cmd_sts 80C30000 byt_cnt 02800280 buf_ptr
    74EC4D0
    tmd(74BD2A0): nbd 74BD2B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD2B0): nbd 74BD2C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD2C0): nbd 74BD2D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD2D0): nbd 74BD2E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD2E0): nbd 74BD2F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71036F0
    tmd(74BD2F0): nbd 74BD300 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71043F0
    tmd(74BD300): nbd 74BD310 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD310): nbd 74BD320 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D7974
    tmd(74BD320): nbd 74BD330 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD330): nbd 74BD340 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD340): nbd 74BD350 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD350): nbd 74BD360 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD360): nbd 74BD370 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD370): nbd 74BD380 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD380): nbd 74BD390 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD390): nbd 74BD3A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD3A0): nbd 74BD3B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA190
    tmd(74BD3B0): nbd 74BD3C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD3C0): nbd 74BD3D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD3D0): nbd 74BD3E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C6600
    tmd(74BD3E0): nbd 74BD3F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103A30
    tmd(74BD3F0): nbd 74BD400 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD400): nbd 74BD410 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD410): nbd 74BD420 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD420): nbd 74BD430 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD430): nbd 74BD440 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD440): nbd 74BD450 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD450): nbd 74BD460 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD460): nbd 74BD470 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD470): nbd 74BD480 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD480): nbd 74BD490 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD490): nbd 74BD4A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD4A0): nbd 74BD4B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71036F0
    tmd(74BD4B0): nbd 74BD4C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9B10
    tmd(74BD4C0): nbd 74BD4D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD4D0): nbd 74BD4E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102370
    tmd(74BD4E0): nbd 74BD4F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD4F0): nbd 74BD500 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD500): nbd 74BD510 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD510): nbd 74BD520 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71036F0
    tmd(74BD520): nbd 74BD530 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9B10
    tmd(74BD530): nbd 74BD540 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD540): nbd 74BD550 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD550): nbd 74BD560 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD560): nbd 74BD570 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD570): nbd 74BD580 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD580): nbd 74BD590 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD590): nbd 74BD5A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD5A0): nbd 74BD5B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71014D4
    tmd(74BD5B0): nbd 74BD5C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD5C0): nbd 74BD5D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD5D0): nbd 74BD5E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD5E0): nbd 74BD5F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD5F0): nbd 74BD600 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74C9F60
    tmd(74BD600): nbd 74BD610 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD610): nbd 74BD620 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD620): nbd 74BD630 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAB50
    tmd(74BD630): nbd 74BD640 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7106C70
    tmd(74BD640): nbd 74BD650 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E2D90
    tmd(74BD650): nbd 74BD660 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E94B0
    tmd(74BD660): nbd 74BD670 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E18F0
    tmd(74BD670): nbd 74BD680 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E9B90
    tmd(74BD680): nbd 74BD690 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74EB030
    tmd(74BD690): nbd 74BD6A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E26B0
    tmd(74BD6A0): nbd 74BD6B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DCD50
    tmd(74BD6B0): nbd 74BD6C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD6C0): nbd 74BD6D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DAE90
    tmd(74BD6D0): nbd 74BD6E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74E0450
    tmd(74BD6E0): nbd 74BD6F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD6F0): nbd 74BD700 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD700): nbd 74BD710 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD710): nbd 74BD720 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD720): nbd 74BD730 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD730): nbd 74BD740 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD740): nbd 74BD750 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD750): nbd 74BD760 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD760): nbd 74BD770 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490
    tmd(74BD770): nbd 74BD780 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104A70
    tmd(74BD780): nbd 74BD790 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD790): nbd 74BD7A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71026B0
    tmd(74BD7A0): nbd 74BD7B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D97D0
    tmd(74BD7B0): nbd 74BD7C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD7C0): nbd 74BD7D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD7D0): nbd 74BD7E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA810
    tmd(74BD7E0): nbd 74BD7F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA190
    tmd(74BD7F0): nbd 74BD800 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9B10
    tmd(74BD800): nbd 74BD810 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD810): nbd 74BD820 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103D70
    tmd(74BD820): nbd 74BD830 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103A30
    tmd(74BD830): nbd 74BD840 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD840): nbd 74BD850 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103070
    tmd(74BD850): nbd 74BD860 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102D30
    tmd(74BD860): nbd 74BD870 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9150
    tmd(74BD870): nbd 74BD880 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71029F0
    tmd(74BD880): nbd 74BD890 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74DA4D0
    tmd(74BD890): nbd 74BD8A0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71005D4
    tmd(74BD8A0): nbd 74BD8B0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104DB0
    tmd(74BD8B0): nbd 74BD8C0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9E50
    tmd(74BD8C0): nbd 74BD8D0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7103A30
    tmd(74BD8D0): nbd 74BD8E0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7104730
    tmd(74BD8E0): nbd 74BD8F0 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71033B0
    tmd(74BD8F0): nbd 74BD900 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    71040B0
    tmd(74BD900): nbd 74BD910 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    7102030
    tmd(74BD910): nbd 74BD120 cmd_sts 00C30000 byt_cnt ABCDABCD buf_ptr
    74D9490

    buffer size 1524
     
    John, Sep 23, 2009
    #14
  15. John

    bod43 Guest

    bod43, Sep 23, 2009
    #15
  16. John

    John Guest

    Hey Bod,

    I tried show controllers t1, but it didn't show anything. I did happen to
    try this though, and I'm thinking it's what you wanted to see:

    Does this at least narrow down which Router is getting out of sync? Thanks.

    RouterA#show service-module serial 0/0/0
    Interface Serial0/0/0
    Module type is T1/fractional
    Hardware revision is 1.2, Software revision is 20070620,
    Image checksum is 0x4144A7, Protocol revision is 0.1
    Receiver has no alarms.
    Framing is ESF, Line Code is B8ZS, Current clock source is internal,
    Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536
    Kbits/sec.
    Last module self-test (done at startup): Passed
    Last clearing of alarm counters 2w0d
    loss of signal : 1, last occurred 1w6d
    loss of frame : 1379, last occurred 00:13:57
    AIS alarm : 1378, last occurred 00:13:57
    Remote alarm : 3, last occurred 1w0d
    Module access errors : 0,
    Total Data (last 96 15 minute intervals):
    0 Line Code Violations, 91 Path Code Violations
    3 Slip Secs, 2509 Fr Loss Secs, 0 Line Err Secs, 55 Degraded Mins
    98 Errored Secs, 22 Bursty Err Secs, 0 Severely Err Secs, 2509 Unavail
    Secs
    Data in current interval (399 seconds elapsed):
    0 Line Code Violations, 0 Path Code Violations
    0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
    0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

    ---------------------------------------------------------------------------

    RouterB#show service-module serial 0/0/0
    Interface Serial0/0/0
    Module type is T1/fractional
    Hardware revision is 1.2, Software revision is 20070620,
    Image checksum is 0x4144A7, Protocol revision is 0.1
    Receiver has no alarms.
    Framing is ESF, Line Code is B8ZS, Current clock source is line,
    Fraction has 24 timeslots (64 Kbits/sec each), Net bandwidth is 1536
    Kbits/sec.
    Last module self-test (done at startup): Passed
    Last clearing of alarm counters 3w0d
    loss of signal : 2031, last occurred 00:02:40
    loss of frame : 2037, last occurred 00:02:40
    AIS alarm : 6, last occurred 1w0d
    Remote alarm : 3, last occurred 1w0d
    Module access errors : 0,
    Total Data (last 96 15 minute intervals):
    953406 Line Code Violations, 68 Path Code Violations
    3 Slip Secs, 2635 Fr Loss Secs, 379 Line Err Secs, 8 Degraded Mins
    22 Errored Secs, 1 Bursty Err Secs, 0 Severely Err Secs, 2635 Unavail
    Secs
    Data in current interval (66 seconds elapsed):
    0 Line Code Violations, 0 Path Code Violations
    0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
    0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs
     
    John, Sep 24, 2009
    #16
  17. I've literally done many hundreds of T1s with cat3 or cat5 cabling.
    Just think of what the telco uses out in the field to run T1s.
    voice-grade cable all the way. Once its inhouse, they'll use whatever
    house wiring is there to run it to your CPE.
    ABAM cable. Google that and you'll get thousands of hits.
    In the field, I've seen it literally twice, and have used it once.
    Compared to multi-hundreds of installs on cat5/cat3/voice-grade.
    ABAM cabling is thicker guage (22AWG compared to 24AWG). Each pair
    inside the cable (ie. receive and transmit) is individually shielded.

    Thats it.
    Copper is copper otherwise. FEXT and NEXT are inline with cat3/cat5.

    I don't think running ABAM cabling vs. cat5 is going to give you any
    different (other than perhaps different copper). Its hard to source,
    nobody has it local, it usually has to be shipped in from the manufactorer.

    The main rule of thumb in the field is with multiple T1 runs, you'll
    want to put all the receives on one binder, and all the transmits on
    another binder. If you have one or two, this rule isn't all that
    important either..
     
    Doug McIntyre, Sep 24, 2009
    #17
  18. Not out of sync, but it shows you which one is the problem one.
    Are these incrementing currently? LCVs are a cabling problem somewhere
    on this end, or a bad line card, or something telco/cabling related.

    Get the telco out with their testset to run patterns to narrow this down.

    They can jack in at the CO and run bert from there out for each leg.
     
    Doug McIntyre, Sep 24, 2009
    #18
  19. John

    John Guest

    Thanks Doug. The line code violations are increasing. Everything else is
    basically the same. So I have a couple of questions in trying to understand
    the problem, but before I do, this is basically what my setup looks like:

    RouterB ----------- Telco-------------
    RouterA
    (B: Has long cable from smartjack to router)
    (A: Has line as internal)
    (B: Has line as clock source)
    (A: Working fine)
    (B: The problem child)

    Based on everyone's help, it looks like RouterB (because of the increasing
    line code violations), has either a problem with the long cable [though this
    is unlikely], has a hardware failure, or their is a problem at the telco.
    So ...

    - Since RouterB's clock source is set to line, this means he is getting the
    clock from the Telco. Based on that, then it shouldn't matter to RouterB
    what RouterA's clock source is set to. Correct?

    - Is it possible that the telco guy wanted me to set RouterB's clock source
    to line and RouterA's clock source to internal so that RouterB would get his
    clock from RouterA?

    - Currently, RouterA's clock source is set to internal (though it works with
    line too). Since this should probably be set to line (even though the guy
    from the telco told us to set it to internal), how is this even working?

    - If we replace RouterB with a new router, but place the current CSU/DSU
    card in RouterB into NewRouterB, is it possible that this will help the
    situation?

    - If we replace the long cable at RouterB with a new ABAM cable, will this
    likely help?

    - If we just swap out RouterA and RouterB with NewRouterA and NewRouterB
    (both with new csu/dsu cards), will this have a high probability to fix the
    issue?

    Thanks again.
    -- John
     
    John, Sep 24, 2009
    #19
  20. Pure and simple - if Telco supplies clock, both routers should be set to
    "line". If Telco doesn't supply clock - one end should be set to
    "internal". If "line"-"line" is working, Telco is supplying clock even
    if they say otherwise. Just ignore them.
    Chances of running into competent telco technician are somewhat between
    winning the lottery and running into T Rex.
    Clock difference is not big enough to cause the problem. But you will
    see slips now and then.
    Highly unlikely.
    You can find out. Disconnect long cable, plug loopback into smartjack,
    run extended ping from RouterA and see if errors are increasing. If line
    runs clean - you probably found the culprit.
    Quite low probability.

    Regards,
    Andrey.
     
    Andrey Tarasov, Sep 24, 2009
    #20
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.