RAC 11.2.0.2 Grid install fails on second node until disable virbr0 virtual network
I found I had to disable the virbr0 network interface to get Oracle RAC 11gR2 11.2.0.2 to install correctly (on RHEL 5.8 64 bit 2.6.18-308.el5 with ocfs2).
Problem was that root.sh failed on the second node. The error recorded in ocssd.log, “has a disk HB, but no network HB”, appeared to point to the multicast issue of bug 9974233 / note 12123703.1. However downloading and running masttest.pl showed that the eth1 interface, which is what the private interconnect ought to have been using, was ok for multicasting.
This command showed me that the private interconnect was actually using the ‘virbr0’ interface instead of the ‘eth1’ interface I wanted:
$GRID_HOME/bin/oifcfg getif
Fix was to remove the virbr0 entries in “ipcs -a” altogether with these commands:
virsh net-destroy default virsh net-undefine default service libvirtd restart
From http://www.cyberciti.biz/faq/linux-kvm-disable-virbr0-nat-interface/
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