[c-nsp] T-1 errors, unable to pinpoint if CSU or circuit issue

Tue May 7 11:53:14 EDT 2013

Hello,

Let me just first say "Thank you" to everybody that has helped in my previous post. This list is awesome.

AS for the curren problem, I keep getting voip issues, including the occasional phone call drop. I have a dedicated T-1 or voip traffic and minor site-to-site vpn traffic with a QoS policy applied to handle voice traffic. These problems have occured even when I took the vpn offline. The telco provider always states the line is clean. I replaced the cable from the smartjack to the CSU in the router as well. I have only gotten a few errors over the past week so the issue looks to be brief and intermittent. The logs in the router never show any issues with CSU.

1) any idea on verify the CSU is causing the Line Errors below?
2) Any ideas on the cause or how to isolate the issue?

I will probalby turn on debug for the interface in hopes of getting time stamps for the interface resets so I can tie them to any voip issues.

#sho service-module serial 0/1/0
Interface Serial0/1/0
Module type is T1/fractional
    Hardware revision is 1.0, Software revision is 001,
    Image checksum is 0x0, 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 3d01h
    loss of signal        :    0,
    loss of frame         :    0,
    AIS alarm             :    0,
    Remote alarm          :    0,
    Module access errors  :    0,
Total Data (last 0 15 minute intervals):
    0 Line Code Violations, 0 Path Code Violations
    0 Slip Secs, 0 Fr Loss Secs, 37 Line Err Secs, 0 Degraded Mins
    4 Errored Secs, 0 Bursty Err Secs, 14 Severely Err Secs, 20 Unavail Secs
Data in current interval (0 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

sh int s0/1/0
Serial0/1/0 is up, line protocol is up
  Hardware is GT96K with integrated T1 CSU/DSU
  Internet address is x.x.x./30
  MTU 1500 bytes, BW 1544 Kbit/sec, DLY 20000 usec,
     reliability 255/255, txload 4/255, rxload 5/255
  Encapsulation PPP, LCP Open
  Listen: CDPCP
  Open: IPCP, loopback not set
  Keepalive set (10 sec)
  Last input 00:00:01, output 00:00:00, output hang never
  Last clearing of "show interface" counters 3d01h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 557
  Queueing strategy: Class-based queueing
  Output queue: 0/1000/0 (size/max total/drops)
  5 minute input rate 35000 bits/sec, 10 packets/sec
  5 minute output rate 28000 bits/sec, 7 packets/sec
     3132198 packets input, 1283936661 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     289 input errors, 289 CRC, 39 frame, 3 overrun, 0 ignored, 67 abort
     2561565 packets output, 793225489 bytes, 0 underruns
     0 output errors, 0 collisions, 2 interface resets
     0 unknown protocol drops
     6 unknown protocol drops
     0 output buffer failures, 0 output buffers swapped out
     0 carrier transitions
     DCD=up  DSR=up  DTR=up  RTS=up  CTS=up

show controllers s0/1/0

67 input aborts on receiving flag sequence
0 throttles, 0 enables
3 overruns
0 transmitter underruns
0 transmitter CTS losts
3122313 rxintr, 2544022 txintr, 0 rxerr, 0 txerr
5517559 mpsc_rx, 0 mpsc_rxerr, 66 mpsc_rlsc, 524 mpsc_rhnt, 5517442 mpsc_rfsc
5 mpsc_rcsc, 0 mpsc_rovr, 0 mpsc_rcdl, 0 mpsc_rckg, 0 mpsc_bper
0 mpsc_txerr, 1882006 mpsc_teidl, 0 mpsc_tudr, 0 mpsc_tctsl, 0 mpsc_tckg
0 sdma_rx_sf, 0 sdma_rx_mfl, 3 sdma_rx_or, 67 sdma_rx_abr, 39 sdma_rx_no
0 sdma_rx_de, 0 sdma_rx_cdl, 289 sdma_rx_ce, 0 sdma_tx_rl, 0 sdma_tx_ur, 0 sdma_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 (21)(0x0F06E930), rxr tail (0)(0x0F06E7E0)
  rmd(F06E7E0): nbd F06E7F0 cmd_sts 80800000 buf_sz 06000000 buf_ptr F07D1E0
  rmd(F06E7F0): nbd F06E800 cmd_sts 80800000 buf_sz 06000000 buf_ptr F073F40
  rmd(F06E800): nbd F06E810 cmd_sts 80800000 buf_sz 06000000 buf_ptr F073F40
  rmd(F06E810): nbd F06E820 cmd_sts 8

sh inventory
NAME: "chassis", DESCR: "2801 chassis"
PID: CISCO2801         , VID: V05, SN: FTX1046Z0J0

NAME: "WIC/VIC/HWIC 1", DESCR: "WAN Interface Card - HWIC CSU/DSU"
PID: HWIC-1DSU-T1      , VID: V01 , SN: FOC143315FZ

NAME: "WIC/VIC/HWIC 3", DESCR: "9 Port FE Switch"
PID: HWIC-D-9ESW       , VID: VN/A, SN: FOC09423UG8

NAME: "WIC/VIC/HWIC 3 Power Daughter Card", DESCR: "9-Port HWIC-ESW Power Daughter Card"
PID: ILPM-8            , VID: VN/A, SN: FOC09423075

NAME: "PVDM 0", DESCR: "PVDMII DSP SIMM with one DSP with half channel capcity"
PID: PVDM2-8           , VID: NA  , SN: FOC09351ATH

NAME: "PVDM 1", DESCR: "PVDMII DSP SIMM with one DSP with half channel capcity"
PID: PVDM2-8           , VID: NA  , SN: FOC09471S4U

NAME: "AIM Service Engine 0", DESCR: "AIM Service Engine"
PID: AIM-CUE           , VID: V01 , SN: FOC09413PG2

Thank you,