Cisco UCS Fabric Interconnect HA Architecture
Essentially, each Cisco UCS Fabric Interconnect runs an instance of the Cisco UCS Manager (UCSM). In an HA cluster setup, these Cisco UCSM instances (maximum of two in a domain) communicate privately over the L1-L2 links. These dual links are utilized as cluster interconnects to carry heartbeat, command, and configuration database synchronization.
The UCSM management plane instance runs in active/standby architecture while the data plane remains fully active/active. The active UCSM instance is known as primary, whereas the standby instance is known as subordinate. It is important to note that the ...
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