Networking Preparations; Switch And Node Redundancy; Port Requirements; Switch And Cable Requirements - Scale Computing HC3 Manual

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The system networking environment must meet specific requirements to ensure proper operation during and
after the installation of your HC3 system.

Switch and Node Redundancy

Scale Computing nodes are designed for network and data redundancy. This section offers tips and best
practices for fully utilizing these features in the HC3 system. Not all high availability features will be available in
Single Node Systems (SNS).
• (*) Use two switches for each HC3 system and balance one LAN and one backplane connection on
each switch, separated by VLANs with interconnects between the switches; this configuration ensures
not only port failover on the nodes, but also port failover on the switches and full switch redundancy if a
switch were to fail.
• Use two different UPS for each of the system nodes' power supplies and switches, and even different
power circuits; this configuration ensures the best possible node and switch power redundancy.
• Always use all four network ports on the nodes, both LAN and both backplane.
• Always use both power supplies on the nodes.
• Nodes should not be geographically dispersed amongst different physical locations; when you set up
nodes for your system, select one physical location for each system.
• (*) Scale Computing provides non-disruptive rolling software updates, reliant on enough free RAM being
available to operate with one node unavailable.
• (*) Automated VM failover is configured in the event of a node failure scenario; this ensures running VMs
will resume operation on the running nodes if their current node fails for any reason.

Port Requirements

This list details which network ports the system can be expected to transmit data on for any applicable firewall
rules.
• Network Time Protocol (NTP) - User Datagram Protocol (UDP), Port 123
• Outgoing Simple Mail Transfer Protocol (SMTP) Server - Transmission Control
Protocol (TCP), Port 25, 587, where 25 is the non-secure default for many environments and 587 is the
default for many secure SMTP servers; this is dependent on enviroment configurations
• Scale System Replication - TCP, Port 10022
• Outbound Secure Shell (SSH) - TCP, Port 22, outbound only for use with
remote-support.scalecomputing.com
• Firmware Updates - TCP, Port 80, 443, outbound only for use with
updates.scalecomputing.com

Switch and Cable Requirements

Networking Guidelines and Recommendations
Please reference the
information.
04/2018

Networking Preparations

Firewalls, cables, and switches
guide for the most up-to-date
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