Synology DS1821 Synology High Availability SHA User Guide for DSM 7.1 - Page 7

Network environment, Network settings, Number of network ports, Connection restrictions - + 10gbe card

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Chapter 2: Required Environment Network environment Network settings Make sure that your network settings meet the following requirements; otherwise, you may experience connection errors after performing a failover. • Both hosts must be assigned static IP addresses for the Cluster connection. • Both hosts must connect to the same network via the same network interface. For example, if one host connects to subnet A via LAN 1, the other host also must connect to subnet A via LAN 1. Note: NTP service will be automatically enabled on the active server once the highavailability cluster is created. Number of network ports Both hosts must have the same number of LAN ports. If your host is equipped with additional network interface cards, these network cards also count as additional LAN ports. Note: With a hybrid high-availability cluster, you can have a different number of built-in network ports on each host. Refer to this article for more details. Connection restrictions The servers cannot connect to the network via IPv6, PPPoE, or Wi-Fi. Please make sure to disable these functions before attempting to create a high-availability cluster. Heartbeat connection To ensure that the Heartbeat connection functions properly, the system will automatically confirm and adjust certain connection configurations during cluster setup. Refer to the information below for more details: • Other than the active and passive servers, there should be no other devices between the Heartbeat connection. • We highly recommend you to connect the two hosts directly without passing through any switches. • Make sure to use the fastest network interface on both hosts. For example, if one host is equipped with an additional 10GbE network card, the connection must also use an additional 10GbE network card. • A Heartbeat connection can transfer Jumbo Frame packets to the other Synology NAS using a specified network interface. If the connection passes through a switch, make sure that the switch also supports Jumbo Frame. • A Heartbeat connection requires low latency, and its response time should be less than 1 ms. • The connection speed of the Heartbeat connection must be faster than 50MB/s. 05

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05
Chapter 2: Required Environment
Network environment
Network settings
Make sure that your network settings meet the following requirements; otherwise, you may
experience connection errors after performing a failover.
• Both hosts must be assigned static IP addresses for the Cluster connection.
• Both hosts must connect to the same network via the same network interface. For example,
if one host connects to subnet A via LAN 1, the other host also must connect to subnet A via
LAN 1.
Note:
NTP service will be automatically enabled on the active server once the high-
availability cluster is created.
Number of network ports
Both hosts must have the same number of LAN ports. If your host is equipped with additional
network interface cards, these network cards also count as additional LAN ports.
Note:
With a
hybrid high-availability cluster
, you can have a different number of built-in
network ports on each host. Refer to
this article
for more details.
Connection restrictions
The servers cannot connect to the network via IPv6, PPPoE, or Wi-Fi. Please make sure to
disable
these functions before attempting to create a high-availability cluster.
Heartbeat connection
To ensure that the Heartbeat connection functions properly, the system will automatically
confirm and adjust certain connection configurations during cluster setup. Refer to the
information below for more details:
• Other than the active and passive servers, there should be no other devices between the
Heartbeat connection.
• We highly recommend you to connect the two hosts directly without passing through any
switches.
• Make sure to use the fastest network interface on both hosts. For example, if one host
is equipped with an additional 10GbE network card, the connection must also use an
additional 10GbE network card.
• A Heartbeat connection can transfer Jumbo Frame packets to the other Synology NAS using
a specified network interface. If the connection passes through a switch, make sure that the
switch also supports Jumbo Frame.
• A Heartbeat connection requires low latency, and its response time should be less than 1
ms.
• The connection speed of the Heartbeat connection must be faster than 50MB/s.