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CMDU 0 keeps disabling

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OCCSteve

Technical User
May 18, 2006
19
US
OK, this is causing a headache. After 10-15 minutes of CPU/CMDU 1 being active, we get this sequence:
HWI529 CMB: Primary CP can't access secondary CP
Check both the CMB cable and the standby CP

CIOD126 CMDU 0 DISABLED: due to SPLIT mode

HWI529 CMB: Primary CP can't access secondary CP
Check both the CMB cable and the standby CP

HWI534 CMB: Synchronization of memories begun: CP 1 master

HWI533 CMB: Synchronization of memories completed

A stat (LD 137) shows:
.stat
IOP 0 ENABLED (STANDBY: S/W STATUS) IODUC
IOP 1 ENABLED (ACTIVE) IODUC
CMDU 0 DISABLED (Out of Split Mode)
CMDU 1 ENABLED (ACTIVE)
RDUN DISABLED
ELNK ENABLED
SDEV 1 OK (KC VALID)

After a sync, the new stat has CMDU 0 enabled (standby), and RDUN enabled. scpu is successful in either direction, with all stats being fine unless it is left on CPU 1, at which time this happens. To keep all data the same we do a sync, scpu back to 0, let it run until the midnights. Then we do it again in the morning.

About a month ago CPU 0 went down. When we replaced it last week, we found different databases, indicating a possible connection between the switch failing & the current problem. All faceplate switches are correct, cables have been checked. We did find a bad floppy in one side, but that has been resolved.

Any ideas?
See the next post for more info on the PBX.
 
>ld 22
PT2000

REQ issp

30/05/09 09:20:18
TID: J00035

VERSION 2521
RELEASE 4
ISSUE 50 W
IDLE_SET_DISPLAY NORTEL
SYSTEM HAS NO IN-SERVICE DEPLISTS

SYSTEM HAS NO IN-SERVICE PEPS


LOADWARE VERSION: PSWV 123

INSTALLED LOADWARE PEPS : 0


REQ prt
TYPE cinv

0 15 NT5D10AA 01 NNTM1831N7N3 CP
1 15 NT5D10EA 07 NNTMEJ009EAF CP
0 12 NT6D65AA 11 NNTM1831RP11 CNI
1 12 NT6D65AA 10 NNTM1830TU2R CNI
CMDU1 NT6D64AB 23 NNTM1832KTK7
CMDU0 NT6D64AB 23 NNTM1832KTK7
0 17 NT5D61AB 23 NNTM1832KTK7 IOP
1 17 NT5D61AB 23 NNTM1832KTK7 IOP


 
CORRECTION
CPU 1 is the one that was replaced.
 
try disabling it pull ou and reseat it

OLD ROLMEN WORKING ON NORTELS AND AVAYA
 
It may sound very strange but I and another engineer I know had the same problem. Try replacing the cross over cable used to link the processors. For some reason the Nortel supplied one gave this issue. Changed the crossover and the fault cleared.
 
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