Oracle Technologies Blog

By ASKM

What Happens When VIP fails ?

Posted by Srikrishna Murthy Annam on March 27, 2010

If a node fails, then the node’s VIP address fails over to another node on which the VIP address can accept TCP connections, but it does not accept connections to the Oracle database. Generally, VIP addresses fail over when:

  • The node on which a VIP address runs fails
  • All interfaces for the VIP address fail
  • All interfaces for the VIP address are disconnected from the network

What happens when a Node Fails?

  1. VIP fails over to another node in the cluster
  2. For any connection requests, a silent TCP/IP error is returned and the client fails immediately to the next TNS address.
  3. When the node restarts, the VIP is relocated back to its node

What happens when the Network Interface(s) Fails?

  1. VIP fails over to another node in the cluster, database instance will fail, ASM instance will fail. But from 10.2.0.3, ASM and database instance will not fail
  2. For any connection requests, a silent TCP/IP error is returned and the client fails immediately to the next TNS address.
  3. When fixed, reboot node to return to normal or srvctl start instance to bring VIP, instance, and ASM back online.
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