Hi, Jakub, On Wed, Oct 1, 2008 at 16:04, Jakub Suchy <jakub.suchy@xxxxxxxxxx> wrote: > RHEL5.2 cluster + Cisco 6500/4500/3500 infrastructure, heartbeat going > through these switches, nodes are not linked through crossover cable. I believe you just need to force all nodes to "speak" IGMPv2. Do this: for iface in /proc/sys/net/ipv4/conf/*; do echo '2' > $iface/force_igmp_version done On each node and probably it will work after. Cisco switches generally speak IGMPv2 and Linux defaults to IGMPv3. RHCS depends on multicast to work properly and multicast depends on IGMP. You will need to set this in /etc/sysctl.conf to make it persistent between reboots. Do this: cat << EOF >> /etc/sysctl.conf net.ipv4.conf.all.force_igmp_version = 2 net.ipv4.conf.default.force_igmp_version = 2 EOF Let us know if this resolve your problem. -- Antonio Dias -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
