Changing private hostname
In pre-11.2 Oracle Clusterware, private hostname is recorded in OCR, it can not be updated. Generally private hostname is not required to change. Its associated IP can be changed. The only way to change private hostname is by deleting/adding nodes, or reinstall Oracle Clusterware.
In 11.2 Grid Infrastructure, private hostname is no longer recorded in OCR and there is no dependancy on the private hostname. It can be changed freely in /etc/hosts
Changing private IP
On Unix/Linux systems, the interface names are generally assigned by the OS, and standard names vary by platform. For Windows systems,see additional notes below. Our example below shows currently interface eth0 is used for public with subnet 192.168.1.0, and eth1 for cluster_interconnect/private with subnet 192.168.2.0.
The ‘public’ network is for database client communication (VIP also uses the same network though it’s stored in OCR as separate entry),whereas the ‘cluster_interconnect’ network is for RDBMS/ASM cache fusion. Starting with 11gR2, cluster_interconnect is also used for clusterware heartbeats – this is significant change compare to prior release as pre-11gR2 uses the private nodename that were specified at installation time for clusterware heartbeats.
Changing private IP only without changing network interface, subnet and netmask For example, private IP is changed from 192.168.2.101 to 192.168.2.71, network interface name and subnet remain the same. Simply shutdown Oracle Clusterware stack on the node where change required, make IP modification at OS layer (eg: /etc/hosts, OS network config etc) for private network, restart Oracle Clusterware stack will complete the task.
Check your current settings $ $GRID_HOME/bin/oifcfg getif eth0 192.168.1.0 global public eth1 192.168.2.0 global cluster_interconnect # ifconfig eth1 eth1 Link encap:Ethernet HWaddr 08:00:27:F5:31:22 inet addr:192.168.2.101 Bcast:192.168.2.255 Mask:255.255.255.0 Stop CRS and change IP adress from 192.168.2.101 to 192.168.2.71 for eth1 # $GRID_HOME/bin/crsctl stop crs --> Change IP address and restart network services and verify our settings # service network restart # ifconfig eth1 eth1 Link encap:Ethernet HWaddr 08:00:27:F5:31:22 inet addr:192.168.2.71 Bcast:192.168.2.255 Mask:255.255.255.0 Restart CRS stack # $GRID_HOME/bin/crsctl start crs CRS-4123: Oracle High Availability Services has been started. # $GRID_HOME/bin/crsctl check crs CRS-4638: Oracle High Availability Services is online CRS-4535: Cannot communicate with Cluster Ready Services CRS-4529: Cluster Synchronization Services is online CRS-4533: Event Manager is online Repeat above actions on grac2 and restart CRS stack $ my_crs_stat NAME TARGET STATE SERVER STATE_DETAILS ------------------------- ---------- ---------- ------------ ------------------ ora.ACFS.dg ONLINE ONLINE grac1 ora.ACFS.dg ONLINE ONLINE grac2 ora.DATA.dg ONLINE ONLINE grac1 ora.DATA.dg ONLINE ONLINE grac2 ora.LISTENER.lsnr ONLINE ONLINE grac1 ora.LISTENER.lsnr ONLINE ONLINE grac2 ora.OCR.dg ONLINE ONLINE grac1 ora.OCR.dg ONLINE ONLINE grac2 ora.asm ONLINE ONLINE grac1 Started ora.asm ONLINE ONLINE grac2 Started ... ora.grace2.db ONLINE ONLINE grac1 Open ora.grace2.db ONLINE ONLINE grac2 Open ora.oc4j ONLINE ONLINE grac1 ora.scan1.vip ONLINE ONLINE grac2 ora.scan2.vip ONLINE ONLINE grac1 ora.scan3.vip ONLINE ONLINE grac1 References: Note 276434.1:Modifying the VIP or VIP Hostname of a 10g or 11g Oracle Note 283684.1:How to Change Interconnect/Public Interface IP or Subnet in Oracle Clusterware
3 thoughts on “Change IP adress/hostname of Cluster Interconnect”
Can we have your my_crs_stat script please.
is there a way can you send to my email or if its public can i download that please. I want to use it to my 11g/12c Cluster
You can find these scripts by selecting RAC -> RAC SCRIPTS from my Main Menu.
Note there are 2 scripts one for the lower and one for the upper CW layer.
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