TANDEM 의 4 port 에 도봉,서대문,성동,강남 이 sdlc 로 연결됨. 도봉만이 file send에 문제발생, receive, 조회는 이상없음. 성동,서대문,강남은 이상무.


1.data stream 분석.

  
Traced Object:   3270station
Object Type:     Station
Start Time:      Nov 01 15:17:12
End Time:        Active
Protocol:        Sdlc
User:            root
Event Display:   Hex/EBCDIC
Frames Excluded: none

......
R> 15:50:43.50
   Frame in hex (Length=39):
   c2 4a 2d 00 17 01 00 00 6b 80 00 31 01 03 03 b1   B.......,.......
   90 30 80 00 00 f7 f7 00 00 02 00 00 00 00 00 18   .....77.........
   50 18 50 02 00 00 00 

1)bind parameter(31)
    send RU is f7 (10th) a*2**b (f*2**7)=1920 byte
    receive RU is f7 (11th)a*2**b (f*2**7)=1920 byte
cf)보통 IBM 은 85 85 or 86 86 임. (85=256, 86=512)

......
T> 15:58:36.87  c2 I-Fr  P Nr=00 Ns=04 LU-LU   FMD RQ 
   TH:  FID2 BBIU EBIU          DAF=01 OAF=08 SNF=0013
   RH:  RQ  FMD           EC DR1     ERI              CD              
   Frame in hex (Length=168):
   c2 18 2c 00 01 08 00 13 01 90 20 f5 f6 f5 f0 f3   B..........56503
   f0 f2 f1 f5 f2 f6 f3 f1 f6 f0 f1 f1 f2 f6 f5 f0   0215263160112650
   f3 f0 f2 f1 f5 f2 f6 f3 f1 f6 0e d0 61 c0 e9 d1   3021526316.}/{ZJ
   a1 0f 40 40 40 40 f0 f0 f1 f0 f0 f0 f0 f0 f8 f9   ~.    0010000089
   f0 f7 f0 f1 f8 f9 f0 f7 f0 f1 f8 f9 f0 f7 f0 f1   0701890701890701
   e8 d5 d5 d5 d5 40 40 40 40 40 40 40 40 40 40 40   YNNNN           
   40 40 40 e8 f0 f0 f0 f0 40 40 40 40 40 40 f0 f0      Y0000      00
   f0 f0 f0 f0 0e 90 61 ba 81 a5 b7 d1 d7 b5 a1 94   0000../.av.JP.~m
   71 9f a1 b8 77 c3 a1 0f f6 f3 f6 40 40 40 40 40   ..~..C~.636     
   40 40 40 40 f5 f0 40 0e b8 e5 ff ff 0f 40 40 40       50 ..V...   
   40 40 40 40 40 40 40 40                                   
T> 15:58:37.97  c2 I-Fr    Nr=00 Ns=05 LU-LU   LUSTAT RQ 
   TH:  FID2 BBIU EBIU          DAF=01 OAF=15 SNF=0001
   RH:  RQ  DFC FI     BC EC DR1     ERI                              
   Frame in hex (Length=16):
   c2 0a 2c 00 01 15 00 01 4b 90 00 04 08 31 00 00   B...............
T> 15:58:37.97  c2 I-Fr    Nr=00 Ns=06 SSCP-LU TERM-SELF RQ 
   TH:  FID2 BBIU EBIU          DAF=00 OAF=15 SNF=0000
   RH:  RQ  FMD FI     BC EC DR1                                      
   Frame in hex (Length=17):

2)send 시 죽은순간분석
  08 LU 와 01 LU(host) 간의 전송중에 갑자기 끊어지고 15 LU 에서
  04 08 31 를 보냄.
  (04 : lustat check, 08 31 는 component disconnected 임.)

Created by Lee Seung-Hun             on Oct  24 ,1996


2. 외부환경 check

1)modem line, aurora b/d check
2) speed 9.6K 확인 (express parameter)
3)tacle(32 LU) 에는 disconnect on termination 을 off, auto-connetc 함)
4)KT line check

3.결론
- KT 내부의 receive line status problem,
  도봉구에서 send 시에 문제발생.