Prerequisites for HA

The following lists the prerequisites for the HA feature:

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The HA feature is available only if both devices participating in the HA system are installed with a License Key that includes this feature. For installing a License Key, see License Key.

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The physical connections of the first and second devices to the network (i.e., Maintenance interface and OAMP, Control and Media interfaces) must be identical. This also means that the two devices must use the same Ethernet Groups and the port numbers belonging to these Ethernet Groups. For example, if the first device uses Ethernet Group 1 (with ports 1 and 2), the second device must also use Ethernet Group 1 (with ports 1 and 2).

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Each network interface of the first device must be connected to the same broadcast domain as the identical network interface on the second device. For example, both Management interfaces must be connected to the same broadcast domain, and so on.

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Before configuring HA, determine the required network topology, as described in Network Topology Types and Rx/Tx Ethernet Port Group Settings.

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Maintenance interfaces restrictions:

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The Maintenance interface on each device must be configured (each with a different IP address).

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The maximum delay allowed between the Maintenance interfaces of both devices is 50 ms.

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The Maintenance interface should be able to perform a fast switchover in case of link failure. Therefore, Spanning Tree Protocol (STP) should not be used in this network. The Ethernet connectivity of the Maintenance interface between the two devices should be constantly reliable without any disturbances.