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你说的是FA(Flow Accelerator ),可以和CTF一起使用。
The switch from a BCM4708 to BCM4709 bumps the CPU clock to 1 GHz, in addition to supporting more advanced hardware acceleration. This chip adds Flow Accelerator support (FA for short) on top of the usual Cut-Through-Forwarding (or CTF). This is configurable on the webui as being "Level 1 CTF" or "Level 2 CTF" (the latter adding FA on top of it).
Level 1: CTF (Cut Through Forwarding)
Software optimization technique to accelerate NAT traffic, usually used with speeds over 100Mbits/s, may be required for peak speeds over 200Mbits/s depending on your router hardware.
When CTF/Level 1 acceleration is enabled, the router sends out frames as soon as it knows their destination, without waiting for any acknowledgements, or flow control. This method relies on the destination device to provide information whether the data is corrupt and needs to be resent, however, it only supports adaptive QoS and may cause issues with some applications. It is recommended for fast connections (over 150Mbps) and few local clients, as it improves throughput while reducing latency and router CPU/memory utilization.
Level 2: CTF+FA (CTF/Level 1 + Flow Acceleration)
Hardware NAT acceleration mechanism designed for accelerating wired internet connections. This is typically only needed with very fast broadband connections at speeds over ~500 Mbps, as the traditional full TCP/IP stack and congestion/flow control becomes very taxing on the router's CPU and limited hardware resources.
CTF+FA (Level 2 NAT Acceleration) does not support QoS, and you may have to disable PPPoE and STP (Spanning Tree Protocol).
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