Example Network Configurations
If you have the capability to do so, it’s recommended you set up networking with full redundancy. Such a setup could include two network switches and hosts with at least four network interfaces spread across two network cards. This would allow for failover in the event of the loss of a switch and/or one of the host network cards in addition to separating management and compute network traffic to their own interfaces. Hosts with only four NICs each can still be configured for full redundancy but would have to converge management and compute traffic across the same interfaces. Keep in mind also that these examples use MPIO (multi-path input/output) for storage. It would also be possible to use bonding for storage depending on capabilities of the environment. MPIO is recommended whenever fibre channel or iSCSI LUNs are being used for GFS2 datastores.