DEC PORTswitch 900FP, Руководство по установке и настройке, Страница: 95 / 124

Redundant-Link Operation
Redundant-Link Configuration A–5
Redundant-Link Operation
How does it work?
The MCA controls the redundant-link operation by:
•
Enabling the primary link at initialization time (assuming that there
are no failures on that link).
•
Monitoring the primary link status for failures.
•
When it detects a failure of the primary link, it does the following:
1. Disables the primary link.
2. Enables the secondary link.
This action typically occurs within 3 to 6 milliseconds (10
milliseconds maximum).
Once the primary link is repaired, it remains inactive until one of the
following events occur:
•
The MCA detects a failure in the secondary link.
•
The secondary port is internally partitioned or disabled.
•
The module is rebooted.