如果是在oracle 10gRAC, 私网网卡冗余保护只能使用操作系统网卡绑定方式，但是到了oracle 11g,如果担心一个私网网卡故障导致rac节点驱逐，可以使用2个私网网卡，Oracle将自动使用HAIP服务冗余私网网卡。

HAIP之后，无需使用网卡绑定就可以实现私网网卡的冗余。

如下测试环境rac 2节点,linux redhat6.9

1.配置

#/etc/hosts

10.0.0.11 wsgwa1

10.0.0.12 wsgwa2

192.168.53.11 wsgwa1-priv1

192.168.54.11 wsgwa1-priv2

192.168.53.12 wsgwa2-priv1

192.168.54.12 wsgwa2-priv2

10.0.0.13 wsgwa1-vip

10.0.0.14 wsgwa2-vip

10.0.0.15 wsgwa-scan

# cd /etc/sysconfig/network-scripts/

[root@wsgwa2 network-scripts]# cat ifcfg-eth1

DEVICE=eth1

IPADDR=192.168.53.12

BOOTPROTO=static

ONBOOT=yes

[root@wsgwa2 network-scripts]# cat ifcfg-eth2

DEVICE=eth2

IPADDR=192.168.54.12

BOOTPROTO=static

ONBOOT=yes

HWADDR=:0C::3F:A5:

2.测试，down一个私网网卡，如果rac只有一块私网网卡， 假设rac 2节点，将导致节点2被驱逐。

[grid@wsgwa2 ~]$ crsctl stat res -t -init

--------------------------------------------------------------------------------

NAME           TARGET  STATE        SERVER                   STATE_DETAILS

--------------------------------------------------------------------------------

Cluster Resources

--------------------------------------------------------------------------------

ora.cluster_interconnect.haip

              ONLINE  ONLINE       wsgwa2

[grid@wsgwa2 ~]$ ifconfig -a

eth1      Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:192.168.53.12  Bcast:192.168.53.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3f:a584/ Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

          RX packets: errors: dropped: overruns: frame:

          TX packets: errors: dropped: overruns: carrier:

          collisions: txqueuelen:

          RX bytes: (53.5 MiB)  TX bytes: (90.0 MiB)

eth1:    Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:169.254.109.141  Bcast:169.254.127.255  Mask:255.255.128.0

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

eth2      Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:192.168.54.12  Bcast:192.168.54.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3f:a598/ Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

          RX packets: errors: dropped: overruns: frame:

          TX packets: errors: dropped: overruns: carrier:

          collisions: txqueuelen:

          RX bytes: (68.8 MiB)  TX bytes: (97.5 MiB)

eth2:    Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:169.254.174.33  Bcast:169.254.255.255  Mask:255.255.128.0

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

[grid@wsgwa2 ~]$ oifcfg iflist

eth1  192.168.53.0

eth1  169.254.0.0

eth2  192.168.54.0

eth2  169.254.128.0

bond0  10.0.0.0

[grid@wsgwa2 ~]$ oifcfg getif

eth2  192.168.54.0  global  cluster_interconnect

eth1  192.168.53.0  global  cluster_interconnect

bond0  10.0.0.0  global  public

SQL> select * from gv$cluster_interconnects;

   INST_ID NAME            IP_ADDRESS       IS_ SOURCE

---------- --------------- ---------------- --- -------------------------------

          eth1:          169.254.109.141  NO

          eth2:          169.254.174.33   NO

          eth1:          169.254.22.31    NO

          eth2:          169.254.202.196  NO

[root@wsgwa2 ~]# ifconfig eth1 down

grid_alert

Sun May  ::

SKGXP: ospid : network interface with IP address 169.254.109.141 no longer running (check cable)

SKGXP: ospid : network interface with IP address 169.254.109.141 is DOWN

Sun May  ::

SKGXP: ospid : network interface with IP address 169.254.109.141 is now running

SKGXP: ospid : network interface with IP address 169.254.109.141 is now UP

#ifconfig -a  ip 169.254..141移动到存活的eth2网卡上

eth1      Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:192.168.53.12  Bcast:192.168.53.255  Mask:255.255.255.0

          BROADCAST MULTICAST  MTU:  Metric:

          RX packets: errors: dropped: overruns: frame:

          TX packets: errors: dropped: overruns: carrier:

          collisions: txqueuelen:

          RX bytes: (55.8 MiB)  TX bytes: (94.0 MiB)

eth2      Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:192.168.54.12  Bcast:192.168.54.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3f:a598/ Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

          RX packets: errors: dropped: overruns: frame:

          TX packets: errors: dropped: overruns: carrier:

          collisions: txqueuelen:

          RX bytes: (72.9 MiB)  TX bytes: (102.7 MiB)

eth2:    Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:169.254.174.33  Bcast:169.254.255.255  Mask:255.255.128.0

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

eth2:    Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:169.254.109.141  Bcast:169.254.127.255  Mask:255.255.128.0

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

启动恢复

[root@wsgwa2 ~]# ifconfig eth1 up

eth1      Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:192.168.53.12  Bcast:192.168.53.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3f:a584/ Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

          RX packets: errors: dropped: overruns: frame:

          TX packets: errors: dropped: overruns: carrier:

          collisions: txqueuelen:

          RX bytes: (56.0 MiB)  TX bytes: (94.1 MiB)

eth1:    Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:169.254.109.141  Bcast:169.254.127.255  Mask:255.255.128.0

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

eth2      Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:192.168.54.12  Bcast:192.168.54.255  Mask:255.255.255.0

          inet6 addr: fe80::20c:29ff:fe3f:a598/ Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

          RX packets: errors: dropped: overruns: frame:

          TX packets: errors: dropped: overruns: carrier:

          collisions: txqueuelen:

          RX bytes: (75.6 MiB)  TX bytes: (106.6 MiB)

eth2:    Link encap:Ethernet  HWaddr :0C::3F:A5:

          inet addr:169.254.174.33  Bcast:169.254.255.255  Mask:255.255.128.0

          UP BROADCAST RUNNING MULTICAST  MTU:  Metric:

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