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10 CHAPTER 1: INITIAL CONFIGURATION
IP Configuration 3Com recommends that you define the IP configuration using the
/etc/hosts files on the two systems.
The /etc/hosts file on each server must contain identical information
about the Intelligent Mirroring configuration. Other information in the
file may vary. The examples in this document contain the information
that must be identical.
For each network to which Intelligent Mirroring is connected, you
must configure four unique IP addresses, all on the same subnetwork:
■ Two of these addresses are static and are assigned to the primary
network interface cards on the two systems.
■ The other two IP addresses are aliases that are dynamically assigned
based on the state (active versus standby) of the Intelligent Mirroring
servers. These addresses are not associated with any hardware.
Single Network
Configuration
To configure both the Primary and Secondary servers on a single network,
follow the instructions in this section. For the instructions on how to
configure the servers on two networks, see
Dual Network Configuration.
3Com recommends that you configure the systems on which
Intelligent Mirroring runs so that each one is connected to two
independent networks on separate switches. This provides additional
reliability should problems develop on either network (for example, if
a switch fails). See
Figure 1 on page 12.
The examples in this section are based on these assumptions:
System 1 (Primary Server)
■ System Name — voipbox1
■ IP Address (subnetwork 126) — 192.168.126.1 (associated with
the primary network interface on the Primary Server)
System 2 (Secondary Server)
■ System Name — voipbox2
■ IP Address (subnetwork 126) — 192.168.126.2 (associated with
the primary network interface on the Secondary Server)