mirror of
https://github.com/opnsense/docs
synced 2024-11-17 03:25:33 +00:00
44 lines
1.5 KiB
ReStructuredText
44 lines
1.5 KiB
ReStructuredText
=====================================
|
||
High Availability & Hardware Failover
|
||
=====================================
|
||
OPNsense utilizes the Common Address Redundancy Protocol or CARP for hardware
|
||
failover. Two or more firewalls can be configured as a failover group. If one
|
||
interface fails on the primary or the primary goes offline entirely, the
|
||
secondary becomes active.
|
||
|
||
Utilizing this powerful feature of OPNsense creates a fully redundant firewall
|
||
with automatic and seamless fail-over. While switching to the backup network
|
||
connections will stay active with minimal interruption for the users.
|
||
|
||
.. image:: images/light_bulbs.png
|
||
:scale: 100%
|
||
|
||
------------------
|
||
Automatic failover
|
||
------------------
|
||
|
||
If the primary firewall becomes unavailable, the secondary firewall will take
|
||
over without user intervention and minimal interruption.
|
||
|
||
-------------------------
|
||
Synchronized state tables
|
||
-------------------------
|
||
|
||
The firewall’s state table is replicated to all failover configured firewalls.
|
||
This means the existing connections will be maintained in case of a failure,
|
||
which is important to prevent network disruptions.
|
||
|
||
-----------------------------
|
||
Configuration synchronization
|
||
-----------------------------
|
||
|
||
OPNsense includes configuration synchronization capabilities. Configuration
|
||
changes made on the primary system are automatically synchronized to the
|
||
secondary firewall.
|
||
|
||
-----------------
|
||
Configure HA CARP
|
||
-----------------
|
||
|
||
For detailed setup guide see: :doc:`/manual/how-tos/carp`
|