Fw: Redundant Interconnect Usage for 11gR2 RAC

From: Sreejith S Nair <Sreejith.Sreekantan_at_ibsplc.com>
Date: Fri, 16 Sep 2011 11:19:07 +0530
Message-ID: <OFD3309518.B8652F43-ON6525790D.001FF6BC-6525790D.001FF6BF_at_ibsplc.com>

Hi Friends,
I am planning to use this redundant interconnect feature in 11G R2 for one of our prod database running in solaris 10. We have frequent node evictions in this db ( when it was 10g). We have upgraded this and planning to use this feature.

This is what I get from google and metalink.

While in previous releases bonding, trunking, teaming, or similar technology was required to make use of redundant network connections between the nodes to be used as redundant,dedicated, private communication channels or &#8220;interconnect&#8221;, Oracle Clusterware now provides an integrated solution to ensure &#8220;Redundant Interconnect Usage&#8221;. This functionality is available starting with Oracle Database 11g Release 2, Patch Set One (11.2.0.2).

I would like to know how this is to be configured in an environment. Before, raising an SR, I thought i would collect information from someone who have done this before.

So we have a private NIC in two nodes which will act as a private interconnect and with 11G , HAIP will run in this nic. Now, if I want to add one more NIC for redundancy, what are the steps I should do.

1 ) Configure the NIC in hardware level in same subnet
2 ) check the nic availability using ifconfig or some other commands.
3 ) Configure it for RAC using oifcfg as below.

Before

---

# $GRID_HOME/bin/oifcfg getif

eth0 10.2.156.0 global public
eth1 192.168.12.0 global cluster_interconnect

Add eth2 as reduntant NIC

# $GRID_HOME/bin/oifcfg setif -global \

eth2/192.168.12.0:cluster_interconnect

Verify the configuration
# $GRID_HOME/bin/oifcfg getif

eth0 10.2.156.0 global public
eth1 192.168.12.0 global cluster_interconnect eth2 192.168.2.0 global cluster_interconnect

Reboot the nodes and clusterware.

Now, after reboot, clusterware will come up with redundant interconnects. If suppose my eth1 in either node has some problem, the HAIP service running in these nodes will failover to eth2. I hope no other modifications are needed for this. Please someone share your experiences or correct me if I have missed any steps .

Thanks in Advance,
Sreejith

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Received on Fri Sep 16 2011 - 00:49:07 CDT