The GLOBAL SETTINGS panel is where the cluster
administrator defines the
networking details for the primary LVS router's public and private
Figure 10-3. The GLOBAL SETTINGS Panel
The top half of this panel sets up the primary LVS router's public and
private network interfaces. These are the interfaces already configured in Section 9.1.1 Configuring Network Interfaces for a NAT LVS Cluster.
- Primary server public IP
In this field, enter the publicly routable real IP
address for the primary LVS node.
- Primary server private IP
Enter the real IP address for an alternative network interface
on the primary LVS node. This address is used solely as an
alternative heartbeat channel for the backup router and does not
have to correlate to the real private IP address assigned in Section 9.1.1 Configuring Network Interfaces for a NAT LVS Cluster. You may leave this field blank,
but doing so will mean there is no alternate heartbeat channel for
the backup LVS router to use and therefore will create a single
point of failure.
The primary LVS router's private IP can be configured on any
interface that accepts TCP/IP, whether it be an Ethernet adapter
or a serial port.
- Use network type
Click the NAT button to select NAT
The next three fields deal specifically with
the NAT router's virtual network interface connected the private network
with the real servers.
- NAT Router IP
Enter the private floating IP in this text field. This
floating IP should be used as the gateway for the real servers.
- NAT Router netmask
If the NAT router's floating IP needs a particular netmask,
select it from drop-down list.
- NAT Router device
Use this text field to define the device name of the network interface
for the floating IP address, such as eth1:1.
You should alias the NAT floating IP
address to the Ethernet interface connected to the private
network. In this example, the private network is on the
eth1 interface, so
eth1:1 is the floating IP address.
After completing this page, click the
ACCEPT button to make sure you do not lose any
changes when selecting a new panel.