What is the best practice for the sync interface when connecting 2 cluster members using ClusterXL?
We have always connected the cluster members together using the sync interface between them. Just curious if that is according to best practice vs. connecting the members directly to a switch for sync.
From my experience I can say it depends if is a physical cluster or virtual.
If it's physical the sync interface should be in a dedicated vlan and you should keep attention on CCP traffic. Some switches can cause problems with multicast traffic so you have to switch to CCP in broadcast.
In pre R80.10 you have to specify the cluster ID (or MAC magic or fwha_mac_magic) on both members (default value 1) and it must not be in conflict with other cluster on the network.
In a virtual environment (vmware) you have to check the security settings of the portgroups where the vNICs are connected on.
Further info can be found on this sk Connecting multiple clusters to the same network segment (same VLAN, same switch) or How to set ClusterXL Control Protocol (CCP) in Broadcast / Multicast mode in ClusterXL