Users Guide

Figure 2. Rear view of one deployment of EVO:RAIL connected to two TOR switches, which can be used for
redundancy.
EVO:RAIL is more prescriptive than Virtual SAN in order for customers to have a true "appliance"
experience, although VMware Virtual SAN
™
drives many of the hardware components in EVO:RAIL.
VMware Loudmouth autodiscovery capability drives the EVO:RAIL network requirements on the basis of
the RFC-recognized "Zero Network Configuration" protocol. New EVO:RAIL appliances advertise
themselves on a network by using the VMware Loudmouth service, which uses IPv6 multicast. The first
EVO:RAIL node in a cluster creates an instance of vCenter Server, and all additional EVO:RAIL nodes in
one or more appliances join that first instance.
EVO:RAIL network requirements are also driven by Virtual SAN, which uses IPv4 multicast.
The following figure displays the EVO:RAIL cabling in Dell rack with PowerEdgeC6320, Dell ToR switches,
and out-of-band (OOB) switch.
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