INS-40912] Virtual host name: oracle-vip is assigned to another system

I got above error when I try to install RAC on linux redhat.
I configured vip address on /etc/hosts, and it is showing in ifconfig |grep net.
What should I do to fix this error.
I did not find much documents in oracle support.
Do I have to configure vip address in dns?
Thanks,

Here are the wordings from online installation docs:
2.7.2.2 IP Address Requirements for Manual Configuration
If you do not enable GNS, then the public and virtual IP addresses for each node must be static IP addresses, configured before installation for each node, but not currently in use. Public and virtual IP addresses must be on the same subnet.
Oracle Clusterware manages private IP addresses in the private subnet on interfaces you identify as private during the installation interview.
The cluster must have the following addresses configured:
A public IP address for each node, with the following characteristics:
Static IP address
Configured before installation for each node, and resolvable to that node before installation
On the same subnet as all other public IP addresses, VIP addresses, and SCAN addresses
A virtual IP address for each node, with the following characteristics:
Static IP address
Configured before installation for each node, but not currently in use
On the same subnet as all other public IP addresses, VIP addresses, and SCAN addresses
A Single Client Access Name (SCAN) for the cluster, with the following characteristics:
Three Static IP addresses configured on the domain name server (DNS) before installation so that the three IP addresses are associated with the name provided as the SCAN, and all three addresses are returned in random order by the DNS to the requestor
Configured before installation in the DNS to resolve to addresses that are not currently in use
Given a name that does not begin with a numeral
On the same subnet as all other public IP addresses, VIP addresses, and SCAN addresses

Similar Messages

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              TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
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              RX bytes:24422 (23.8 KiB)  TX bytes:900 (900.0 b)
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    VIP : 192.168.0.2 (where 2 is the vip of node 1 which does not exists in the network and its used for communicating only between cluster nodes. If you do a ping test to this VIP before installing the clusterware, it should not ping)
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    Pradeep. V

  • After Grid Infrastructure deinstallation:  [INS-40912] Virtual host name assigned to another system on the network

    Hi,
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    Total memory check passed.
    Free disk space check passed.
    Swap space check passed.
    System architecture check passed.
    Kernel version check passed.
    Package existence check passed for "binutils-2.15.92.0.2-13".
    Group existence check passed for "dba".
    Group existence check passed for "oinstall".
    User existence check passed for "nobody".
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