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QoS and the "Broadcom Cut Through Forwarding feature"
Hi, I've got a r7000 which works well with the V1.0.5.60_1.1.86 firmware. I've a USB drive and a Buffalo NAS connected to it. I have been poking around the forums and came across a post which rec...
Cut Through Forwarding (CTF) is fancy speak for a feature that forwards traffic through the router using the built-in Broadcom chip. CTF enables the router to forward traffic in the most efficient manner possible. It is true that enabling QoS disables CTF. This forces traffic to be handled by the router's CPU, which cannot forward traffic as efficiently as the Broadcom chip. This has the biggest impact on those with Gigabit Internet service. Without CTF, the R7000 can only handle about 450 Mbps, give or take.
Since your Internet service is 150 Mbps, there may not be a noticeable difference without CTF. But it could also be said that QoS may not benefit you much either. QoS is generally more useful when Internet speeds are lower. It works by managing Internet traffic flows and prioritizing the most important ones. With 150 Mbps, several Internet media streams can easily be accommodated with plenty of bandwidth to spare, so there's no need to prioritize traffic. QoS offers no benefit at all for traffic streamed from a local NAS.
Cut Through Forwarding (CTF) is fancy speak for a feature that forwards traffic through the router using the built-in Broadcom chip. CTF enables the router to forward traffic in the most efficient manner possible. It is true that enabling QoS disables CTF. This forces traffic to be handled by the router's CPU, which cannot forward traffic as efficiently as the Broadcom chip. This has the biggest impact on those with Gigabit Internet service. Without CTF, the R7000 can only handle about 450 Mbps, give or take.
Since your Internet service is 150 Mbps, there may not be a noticeable difference without CTF. But it could also be said that QoS may not benefit you much either. QoS is generally more useful when Internet speeds are lower. It works by managing Internet traffic flows and prioritizing the most important ones. With 150 Mbps, several Internet media streams can easily be accommodated with plenty of bandwidth to spare, so there's no need to prioritize traffic. QoS offers no benefit at all for traffic streamed from a local NAS.