High Availability Cluster Server Heartbeat Connections
The primary heartbeat connections between two HA cluster servers are made through a serial connection
and the LAN connections.
The serial connection is made using an 8-Port Asynchronous PCI Adapter or an optional 128-Port
Asynchronous PCI Adapter. The LAN connections are made using a pair of Ethernet, FDDI, token ring, or
ATM connections.
The following figure shows an HA cluster server using the 8-Port Asynchronous PCI Adapter and Ethernet
connections.
Index Description
1 Ethernet connections. The customer is responsible for furnishing the cabling to the Ethernet.
(T2, T5 and 10baseT are all available.
2 8-Port DB-25 connector box (PN 11H5967) supplied with 8-Port Asynchronous
EIA-232E/RS-422A PCI Adapter
3 Serial Port to Serial Port Cable (Rack to Rack, FC 3125)
372 Site and Hardware Planning Information
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