If you are planning to use an external load balancer, you must configure the external load balancer and firewall ports as follows:

• The external load balancer must listen for requests on the Avaya Aura® Device Services service port, which is 443 by default.

• On the Avaya Aura® Device Services administration portal, you must enable the use of an external load balancer. For details, see Administering Avaya Aura® Device Services.

• The external load balancer must send requests that arrive on the Avaya Aura® Device Services service port to Avaya Aura® Device Services servers in the cluster on the service port. As a result, the service port must be reachable from the load balancer through firewalls.

• The external load balancer must listen to port 8440 for requests from the Apple Push Notification service.

For more information about Avaya Aura® Device Services port usage, see Port Matrix for Avaya Aura® Device Services. This document is available on the Avaya Support website. You might need to be logged in to access the document.