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31 lines
1.6 KiB
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31 lines
1.6 KiB
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====================================
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Network
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====================================
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---------------------------------
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netmap (IPS, Sensei, ...)
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---------------------------------
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Netmap is a technology which enables fast packet processing while minimizing overhead, there are however some pittfals
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which may turn your network interface unreachable.
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Before using this technology, always make sure you have access via another interface (or console) to your firewall
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in case connectivity is dropped.
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In order for netmap to function properly it is imperative that all sorts of driver / hardware acceleration is disabled
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(:menuselection:`Interfaces -> Settings`), this include :code:`VLAN Hardware Filtering` as well (which wasn't disabled pre 20.7).
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Some drivers have may have additional tunables, which enable hardware acceleration, make sure to disable them as well
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(.e.g intel ixl has :code:`hw.ixl.enable_head_writeback`, which we disable by default)
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Below you will find a list of tunables which are know to be (partial) incompatible with netmap.
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=========================================== =================================================================================
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Tunable Description
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=========================================== =================================================================================
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hw.ixl.enable_head_writeback Intel :code:`ixl(4)` tunable for increased tx performance,
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OPNsense standard value is disabled.
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=========================================== =================================================================================
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