[cisco-nas] strange MICA behaviour : Disconnect Reason Info: (0x6102)

[Tassos Chatzithomaoglou]

1st question
------------
I have an AS5300 with 2 MICA modules which has ~60 success rate. The quite common 
disconnect reason is the following...DSP is the one that worries me...


  May 18 18:02:26: Modem State event:
                    State: Call Setup
   May 18 18:02:26: Modem State event:
                    State: Connect
   May 18 18:02:26: Modem State event:
                    State: V.8bis Exchange
   May 18 18:02:26: Modem State event:
                    State: Link
   May 18 18:02:26: Modem State event:
                    State: Train Up
   May 18 18:02:38: Modem State event:
                    State: Terminate
   May 18 18:02:38: End Connect event:
     Call Timer:  22 secs
     Disconnect Reason Info:  (0x6102)
        Type (=3 ):  Condition occurred during call setup
       Class (=1 ):  DSP condition
      Reason (=2 ):  failure in modem training up

   May 18 17:03:55: Modem State event:
                    State: Call Setup
   May 18 17:03:55: Modem State event:
                    State: Connect
   May 18 17:03:55: Modem State event:
                    State: V.8bis Exchange
   May 18 17:03:55: Modem State event:
                    State: Link
   May 18 17:04:07: Modem State event:
                    State: Train Up
   May 18 17:04:19: Modem State event:
                    State: Terminate
   May 18 17:04:19: End Connect event:
     Call Timer:  22 secs
     Disconnect Reason Info:  (0x6102)
        Type (=3 ):  Condition occurred during call setup
       Class (=1 ):  DSP condition
      Reason (=2 ):  failure in modem training up

  May 18 17:18:21: Modem State event:
                    State: Call Setup
   May 18 17:18:21: Modem State event:
                    State: Connect
   May 18 17:18:21: Modem State event:
                    State: V.8bis Exchange
   May 18 17:18:21: Modem State event:
                    State: Link
   May 18 17:18:21: Modem State event:
                    State: Train Up
   May 18 17:18:33: Modem State event:
                    State: Terminate
   May 18 17:18:33: End Connect event:
     Call Timer:  16 secs
     Disconnect Reason Info:  (0x6102)
        Type (=3 ):  Condition occurred during call setup
       Class (=1 ):  DSP condition
      Reason (=2 ):  failure in modem training up


Should i replace the chassis or both the mica modules?


2nd question
------------
Quite strangely, while issuing "sh modem call-stats" the router crashed (!) with the 
following stack info.


Minimum process stacks:
  Free/Size   Name
  5672/6000   Reset ipc queue
  5676/6000   HPI Logger
  2512/3000   fstp init
  2464/3000   allegro libretto init
  5608/6000   Microcom DSP download Process
11296/12000  Router Init
  8572/12000  Init
  5424/6000   RADIUS INITCONFIG
10304/12000  Exec
10432/12000  Mica board Download

Interrupt level stacks:
Level    Called Unused/Size  Name
   2        4679   7800/9000  Low IRQ Int Handler
   3         616   8272/9000  High IRQ Int Handler
   4        5555   8592/9000  Console Uart
   6           0   9000/9000  Parity interrupt
   7       25747   8600/9000  NMI Interrupt Handler

System was restarted by bus error at PC 0x6034EB0C, address 0x20686F73
5300 Software (C5300-IS-M), Version 12.2(15)T9,  RELEASE SOFTWARE (fc2)
TAC Support: http://www.cisco.com/tac
Compiled Sat 01-Nov-03 01:30 by ccai
Image text-base: 0x6000894C, data-base: 0x61574000


Stack trace from system failure:
FP: 0x648BD458, RA: 0x6034EB0C
FP: 0x648BD510, RA: 0x6034D518
FP: 0x648BD530, RA: 0x6017B120
FP: 0x648BD590, RA: 0x6017B50C
FP: 0x648BD648, RA: 0x601845D0
FP: 0x648BD680, RA: 0x60185A08
FP: 0x648BD698, RA: 0x6036AF68
FP: 0x648BD6F0, RA: 0x6037DC00

Bug-tool showed "CSCdy14558" as the possible bug, but this one doesn't refer to 12.2(15)T9 
which i'm using. Also the bug notes don't refer the ios versions where the bug is solved.


-- 
***************************************
       Chatzithomaoglou Anastasios
Network Design & Development Department
              FORTHnet S.A.
          <achatz at forthnet.gr>
***************************************