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ON-LINE CONFIGURATION
OPERATION
I-E96-213A
A - 5
Primary
Backup
n
n+1
01xx0x0x 00xx0x0x
z
{
z
z
2. Place the backup MFC in CONFIGURE mode. The green
LED of the backup MFC will blink indicating CONFIGURE
mode. Configuration Commands to the backup MFC are sent
to the address of the primary MFC plus one. The primary MFC
now indicates that the backup MFC is not available for auto-
matic failover.
To return to Step 1 without making any changes, place the
backup MFC in EXECUTE mode; stop and reset it after LED 8
illuminates. Resetting an MFC causes all the LEDs on it to light
momentarily before returning to normal status.
Primary
Backup
n
n+1
01xx0x0x 00xx1x0x
z
5
z
{
When changes are being made to the backup MFC, LED 7
blinks indicating that the configurations of the backup and pri-
mary MFCs do not match.
If these changes to the configuration are incorrect, return to
Step 1 by initializing NVM. Wait for LED 8 on the backup MFC
to light before continuing.
NOTE: When configuring the backup MFC, the following rules are
strictly enforced by the module:
1. Blocks can only be added in the block space at the end of a
segment.
2. A block existing in the primary MFC cannot be deleted.
3.
A specification change cannot be made to a block already exist-
ing in the primary MFC, if that change effects the module utilization
factor (change memory requirements).
4.
Do not attempt to change segment control block priority.
5.
Complete every on-line configuration sequence. Do not abort a
partly completed sequence. For example, do not transfer the backup
MFC to the configure mode and then bring it back to the execute
mode until the on-line configuration sequence is complete.
An attempt to bypass rules 1 through 3 will cause an error
message. An attempt to bypass rules 4 and 5 will not cause an
error message.
Primary
Backup
n
n+1
01xx0x0x 00xx1x0x
z
5
z
{
3. When an error exists in the new configuration, the backup
MFC enters ERROR mode before going to EXECUTE mode. The
user must return to CONFIGURE mode to fix the error. The
green LED of the backup MFC blinks to indicate it is in the
ERROR or CONFIGURE mode. Group A LED 7 of the backup
MFC blinks to indicate that configuration differences exist
between the primary and backup.