RAC 11.2.0.2 Grid infrastructure, private interconnect bonding new feature HAIP

With Redundant Interconnect Usage, you can identify multiple interfaces to use for the cluster private network, without the need of using bonding or other technologies . This functionality is available starting with Oracle Database 11g Release 2 (11.2.0.2). When you define multiple interfaces, Oracle Clusterware creates from one to four highly available IP (HAIP) addresses. Oracle RAC and Oracle ASM instances use these interface addresses to ensure highly available, load-balanced interface communication between nodes. The installer enables Redundant Interconnect Usage to provide a high availability private network. Oracle Database, CSS, OCR, CRS, CTSS, and EVM components in 11.2.0.2 employ Redundant Interconnect Usage. By default, Oracle Grid Infrastructure software uses all of the HAIP addresses for private network communication, providing load-balancing across the set of interfaces you identify for the private network. If a private interconnect interface fails or become non-communicative, then Oracle Clusterware transparently moves the corresponding HAIP (Highly Available IP Address) to one of the remaining functional interfaces. If you have two different interface names to be used for the private interconnect you can provide both the interface names to the oracle grid infrastructure installer and oracle clusterware will create a Highly Available IP Address (HAIP). Oracle recommends: that you use the Redundant Interconnect Usage feature to make use of multiple interfaces for the private network. However, you can also use third-party technologies to provide redundancy for the private network. Note: If you define more than four interfaces as private network interfaces, be aware that Oracle Clusterware activates only four of the interfaces at a time. However, if one of the four active interfaces fails, then Oracle Clusterware transitions the HAIP addresses configured to the failed interface to one of the reserve interfaces in the defined set of private interfaces. Thanks & Regards, Zaman Ahmed Tatari Sr. Oracle Support Analyst OCP 9i/10g(DBA/Developer Track) Ora-Tech Systems (PVT) Ltd. UAN #: 111-ORACLE ext(216) Cell #: 92-300-2542241