Artesyn Centellis 4100 Installation and Use (2015) - Manual (Page 193)

Configuring and Operating the System
Centellis 4100 Installation and Use (6806800D82E) 195
6.7.1.2 Data Replication
During redundant operation, the active shelf manager synchronizes the shelf FRU information
with the standby shelf manager every time it is modified (for example, shelf address shelf IP
address, shelf manager controlled activation, allowance for FRU activation readiness, FRU
activation order).
While the shelf manager is inserted, the active shelf manager synchronizes the shelf FRU
information with the newly inserted shelf manager.
The active shelf manager replicates HPI resource IDs on the standby shelf manager during
redundant operation and during shelf manager insertion.
6.7.1.3 HPI Interface
The HPI interface for the Redundancy Sensor and the Heartbeat Sensor is implemented as
described in the HPI-to-AdvancedTCA Mapping Specification.
6.7.2 System Start-Up Behavior and Dependencies
Once the system is powered on, the shelf manager and the hub blade need to connect and
communicate which blades are active. The following section describes the start-up of a shelf
manager, a hub blade and a system manager. A system manager is not part of a Centellis 4100
system and has to be developed by the customer.
6.7.2.1 Shelf Manager
The shelf manager which becomes active at system start up should have a chance to connect
to a hub blade. But there is no way to identify which hub blade will start as active or standby one
because they are not powered at that moment. The shelf manager only detects whether a hub
blade is present and whether the hub blade’s ejector handles are closed. Then it negotiates its
own active/standby role with its partner ShMC.
The change of shelf address, shelf IP address and FRU activation order takes effect after a reboot
of the system.