6.14.2. Multicast Configuration
- For IPv4 — The address formed is 239.192. plus the lower 16 bits generated by Red Hat High Availability Add-On software.
- For IPv6 — The address formed is FF15:: plus the lower 16 bits generated by Red Hat High Availability Add-On software.
cmangenerates for each cluster. To view the cluster ID, run the
cman_tool statuscommand on a cluster node.
ccs -h host --setmulticast multicastaddress
--setmulticastoption to their default values, as described in Section 6.1.5, “Commands that Overwrite Previous Settings”.
cmanuses. Otherwise, using a multicast address outside that range may cause unpredictable results. For example, using 224.0.0.x (which is "All hosts on the network") may not be routed correctly, or even routed at all by some hardware.
ccscommand, see Section 7.2, “Starting and Stopping a Cluster”.
--setmulticastoption of the
ccsbut do not specify a multicast address:
ccs -h host --setmulticast