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51 lines
1.6 KiB
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51 lines
1.6 KiB
ReStructuredText
=========
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Multi WAN
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=========
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Multi WAN scenarios are commonly used for failover or load balancing, but combinations
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are also possible with OPNsense.
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.. blockdiag::
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:desctable:
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blockdiag {
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WAN_primary -- OPNsense;
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OPNsense -- WAN_backup;
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internet -- WAN_primary;
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WAN_backup -- internet;
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internet [shape="cloud"];
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WAN_primary [shape="cisco.modem",label=""];
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WAN_backup [shape="cisco.modem",label=""];
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}
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------------
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WAN Failover
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------------
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WAN failover automatically switches between WAN connections in case of connectivity
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loss (or high latency) of your primary ISP. As long as the connection is not good
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all traffic will be routed of the next available ISP/WAN connection and when
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connectivity is fully restored so will the routing switch back to the primary ISP.
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------------------
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WAN Load Balancing
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------------------
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Load balancing can be used to split the load between two (or more) ISPs. This
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enhances the total available bandwidth and/or lowers the load on each ISP.
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The principle is simple: Each WAN connection (gateway) gets a portion of the traffic.
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The traffic can be divided equally or weighted.
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------------------------------
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Combining Balancing & Failover
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------------------------------
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It is also possible to combine Load Balancing with Failover in such scenarios
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you will have 2 or more WAN connections for Balancing purposes and 1 or more for
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Failover. OPNsense offers 5 tiers (Failover groups) each tier can hold multiple
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ISPs/WAN gateways.
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-------------
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Configuration
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-------------
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For a how to configure read: :doc:`how-tos/multiwan`
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