Database Reference
In-Depth Information
Gigabit Ethernet Switch
Network port 6
Network port 6
Network port 4
Link Aggregation Group
Network port 4
Gigabit Ethernet Switch
Figure 9-9.
A fully redundant private network configuration
In this example, both nodes dedicate two network ports, port 4 and port 6, to the private network. Each of these
two network ports connects two different-gigabit Ethernet switches dedicated to the private network. These two
switches are also interconnected with two redundant network cables, as shown in Figure
9-9
. Although this example
shows the private network configuration of a two-node cluster, a cluster with three or more nodes is connected in a
similar way. This configuration ensures there is no single point of failure on the private network.
Configuring Network in OS
Once you decide the network interfaces for the public network and private network, you can start configuring these
two networks based on the network interfaces. In this chapter, we mainly focus on how to configure network in Linux.
The public network includes the network interface and the IP address of the host and virtual hostname/IP for
each node and the SCAN name/IP for the cluster. Configuring the public network requires you to do the following:
Give the hostname and its IP address of each RAC node. For example, you have two hosts
•
and their IP addresses: k2r720n1(172.16.9.71) and k2r720n2 (172.16.9.72). Be aware that the
hostname should be composed of alphanumeric characters, and the underscore (“_”) is not
allowed in the hostname.
Configure the network interface of the public network on each RAC node. For example, on
•
Linux, edit /etc/sysconfig/network-scripts/ifcfg-eth0:
DEVICE=eth0
BOOTPROTO=static
HWADDR=00:22:19:D1:DA:5C
ONBOOT=yes
IPADDR=172.16.9.71
NETMASK=255.255.0.0
TYPE=Ethernet
GATEWAY=172.16.0.1
In the preceding output, 172.16.9.71 is the IP address of the public network for the node.
Assign the virtual hostname and VIP for each RAC node. It is recommended that you use
•
the format <public hostname>-vip for the virtual hostname, for example, racnode1-vip. An
example we have set for the following virtual names and VIPs for test cluster: k2r720n1-vip
with IP address 172.16.9.171 and k2r720n2-vip with IP address 172.16.9.172
Give the SCAN (Single Client Access Name) and three SCAN VIPs for the Cluster.For example, we
•
have set the SCAN name kr720n-scan with three scan IP: 172.16.9.74, 172.16.9.75, 172.16.9.76.
