Users Guide

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Networking
Top-of-Rack (TOR) switch
A 10 GbE TOR requires both IPv4 and IPv6 multicast support. The network can be configured flat or with
VLANs.
• IPv4 and IPv6 multicast must be enabled on all ports of the TOR switch. When using multiple TOR
switches, ISL multicast traffic for IPv4 and IPv6 must be able to communicate between the switches.
• To configure a management VLAN on your TOR switches, allow multicast traffic to passthrough.
• To allow multicast traffic to passthrough, there are two options for either all EVO:RAIL ports on your
TOR switch or for the Virtual SAN and management VLANs (if VLANs are configured):
a. Enable IGMP Snooping on your TOR switches, and then enable IGMP Querier.
NOTE: By default, most of the TOR switches enable IGMP Snooping, but disable IGMP
Querier.
b. Disable IGMP Snooping on your TOR switches. This option may lead to increased network traffic.
Table 2. VMware Network guidelines
Setting Mandatory/ Recommended Notes
IPv6 enabled on all ports
Eight ports for RJ-45 or SFP+ for each EVO:RAIL appliance. One port for a workstation or laptop to
access EVO:RAIL
IPv4 Multicast Mandatory for VSAN VLAN Used for VSAN network for meta
data and heart beat
communication
IPv6 multicast Mandatory for Management
VLAN
Used for EVO RAIL discovery,
update, maintenance and scaling
workflows
IGMP Snooping AND IGMP
Querier
Recommended to prevent
additional Multicast traffic.
Mandatory for VSAN if you are
sharing VSAN VLAN with other
hosts in network.
Helps restrict flooding of
multicast and non-EVO Rail
traffic to all ports.
MLD Snooping Optional EVO RAIL IPv6 multicast traffic is
small and hence the flooding has
little or no impact
L3 Multicast Not needed
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