DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Architecture
1-22SPE Duplication
1
Figure 1-8. Handshake Communication Path
Maintenance of Standby Components
When handshake communication is up, maintenance for individual components
of the standby SPE is the same as that for the active (except in some details for
PKT-INT). The same commands are used to test standby and active circuit
packs, and the error and alarm logs maintained on the active side record data for
both.
If a major on-board alarm is raised against a standby SYSAM, Processor,
Memory, MSSNET, or Packet Interface board, the standby SPE’s SOH is lowered
to
partially-functional
. Once that board’s problem is fixed and the alarm cleared,
system software automatically raises the standby SPE’s SOH to
not-refreshed
or
functional
, depending on whether its memory is up to date.
Standby component faults can also affect memory shadowing. Certain faults can
have negative effects on system operation if memory shadowing is left on. When
these components get major alarms, memory shadowing is automatically kept off
by system software. These are referred to as
shadowing relevant
components.
Roughly, these include the hardware that provide shadowing or the hardware into
which shadowed writes occur.
Table 1-5
below shows the effect often major on-board alarms against standby
components on standby SOH and on memory shadowing. Note that off-board
. . . . . . . . . . .
. . . . . . . . . . .
P
R
O
C
R
SMM
software
SMM: Standby Maintenance Monitor
Request
Response
MAP: Maintenance Action Process
Duplication
Interface Cable
D
U
P
I
N
T
Standby
SPE
Active
SPE
DUP
Driver
P
R
O
C
R
MAP
software
D
U
P
I
N
T
