Proware Epica, User Manual

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NAS System
User Manual 225
12.2.1 Hardware Aspect
Active server: proNAS HA server that performs cluster-protected operations.
Backup (Standby) server: proNAS HA server that can takeover the critical operations
of an active server when the active server is down or unavailable.
Private net: Private net is a dedicated channel for servers to exchange their operating
status (i.e., heartbeat message).
Types of Private Net Available:
TCP/IP socket: Ethernet network running TCP/IP protocol. Each server must
install a dedicated IP to attach to the private net.
RS-232 serial port: One free serial port per server. A null modem cable must be
installed to connect the serial ports of the two servers.
Public net: Public net is the paths for networked clients to access cluster- protected
resources.
Network Configuration for High Availability Pair
The following diagram illustrates the network configuration for a High Availability pair:
Multi Port Switch
Public Net Private Net Private Net Public Net
RS232 Serial Ports
Active Server proNAS HA Resource Backup Server
Virtual IP