Oracle Grid Infrastructure requires 2 network interfaces:
- Public
- Private
The public interface should host the following IPs:
- Public Host IP
- Node VIP
- SCAN VIP
- APP VIP
- GNS VIP
- and Others
While the Private interface hosts only 1 IP, BUT it there can be many private interfaces grouped under HAIP
The following configuration can be used for: Public Interface: eth0
[root@lparacb ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0 HWADDR=08:00:27:70:D3:B7 TYPE=Ethernet ONBOOT=yes BOOTPROTO=static IPADDR=192.168.100.20 NETMASK=255.255.255.0 PEERDNS=no [root@lparacb ~]#
The following configuration can be used for: Private Interface: eth1
[root@lparacb ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth1 DEVICE=eth1 HWADDR=08:00:27:C5:75:A7 TYPE=Ethernet ONBOOT=yes BOOTPROTO=static IPADDR=10.0.2.20 NETMASK=255.255.255.0 PEERDNS=no [root@lparacb ~]#
PEERDNS is important otherwise you will inherit the DNS from the base system