.. _resilience_administration_automatic_failover:

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Administration in Automatic Failover Mode
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In Automatic failover mode, there is an heartbeat link between Standby and Main XiVO.
As soon as Standby XiVO detects Main as unreachable, it will become active - see :ref:`resilience_architecture_failover_mode`.
This page describes when the failover and fallback are triggered and what manual steps might be necesseray in the different deployment type.

.. contents:: :local:


XiVO Deployment
===============

Failover to Standby
-------------------

What happens:

* When Standby does not ping Main anymore, Standby node starts the telephony service
* The supported phones should automatically register and send their calls towards the Standby

Manual actions: None


Failback to Main
------------------

What happens:

* When Standby pings Main again, the standby shutdown the telephony services
* The supported phones should automatically register and send their calls towards the main

Manual actions: None


CC Deployment
=============

Failover to Standby
-------------------

What happens:

* Standby CC starts needed services when it detects Standby XiVO went to status *Active*
* Main CC stops needed services when it detects Main XiVO went to status *Inactive*

Manual actions:

* The users must reconnect manually to the CC Standby by entering the new CC Standby FQDN in their browser


Failback to Main
------------------

What happens:

* Standby CC stops needed services when it detects Standby XiVO went to status *Inactive*
* Main CC starts needed services when it detects Main XiVO went to status *Active*

Manual actions:

* The users must reconnect manually to the CC Main by entering the new CC Main FQDN in their browser


XDS Deployment
==============

Failover to Standby
-------------------

What happens:

* When the standby takes over the telephony service, it registers to the other MDS

Manual actions: None


Failback to Main
------------------

What happens:

* When the main is back again, it registers to the other MDS

Manual actions: None


Edge Deployment
===============

* A single Edge stack is relaying its services to either the Main or the Standby XiVO machines. 


Failover to Standby
-------------------

What happens:

* Edge detects that Main CC/XiVO are not working and redirects the traffic to Standby CC/XiVO

Manual actions: 

* The users must refresh its Web page to reconnect (no need to change FQDN)


Failback to Main
------------------

What happens:

* Edge detects that Standby CC/XiVO are not working and redirects the traffic to Main CC/XiVO

Manual actions: 

* The users must refresh its Web page to reconnect (no need to change FQDN)