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--- advanced-misc [2022/01/09 12:36] – m_ars
+++ advanced-misc [2023/09/25 17:40] – -add further depth to CTF section hogwild
@@ Line 1: / Line 1: @@
 ====== Miscellaneous ======
-This page allows you to tweak some secondary parameters. These are rarely modified so be aware of the consequences if you do so.
+This page allows you to tweak some secondary settings. These settings rarely need to be modified. If you change them, make sure you understand the consequences of doing so.
-**Boot Wait Time *** = Is the time period when a router can be accessed using the included CFE webserver. This refers to the bootstrap portion of the process, or the loading of code before the OS. If you need to delay FreshTomato's boot process (and stay in internal webserver CFE mode), this is the setting to change. In unusual circumstances, such as a power outage, your modem might take longer to boot than FreshTomato does. This would be the setting to tweak to fix that.
+**Boot Wait Time * :**  This is the time period during which a router can be accessed using the included CFE webserver. This refers to the bootstrap portion of the process, or the loading of code before the Operating system loads. If you need to delay the s boot process (to stay in internal webserver CFE mode), change this setting. In rare circumstances, like a power outage, your modem might take longer to boot than FreshTomato does. This setting would be used to tune that until it is optimal.\\  \\
-**WAN Port Speed *** = Enables you to choose between autonegotiate (Default) mode on the WAN port, or forcing a specific combination of speed/duplex for the WAN port. Note that you can only force 10Mbps and 100Mbps. For 1Gpbs, leave the setting on Autonegotiate.
+{{:pasted:20220428-100039.png}} \\   \\   \\   \\ **WAN Port Speed * :**  This allows you to choose either Autonegotiate (Default) mode on the WAN port, or force a specific combination of speed/duplex for the WAN port. Only 10Mbps and 100Mbps speeds can be forced. For 1Gpbs, leave the setting on Autonegotiate.
-[[https://wiki.freshtomato.org/lib/exe/detail.php?id=miscellaneous&media=90cbc74f971153b2c8a278be5eb1f441.png|{{:90cbc74f971153b2c8a278be5eb1f441.png}}]]
+ \\ {{:pasted:20220428-100159.png}} \\   \\   \\ **CTF (Cut-Through Forwarding): ** If checked, this enables Level 1 NAT hardware acceleration.
-**CTF (Cut-Through Forwarding)** If set, this will enable hardware acceleration. For example, this would allow you to use your FreshTomato device in a WAN Gigabit environment. With this option disabled (Default), your WAN-to--LAN performance will depend on the hardware model in use. You might get anything between 200~400Mbps on ARM devices. NOTE: Enabling CTF will disable QoS and Bandwidth Limiter, since the switching part of the packet bypasses parts of the standard Linux iptable chains.
+CTF uses an alternative forwarding method to Store and Forward in bridges. You may need this option if you are on an Internet plan/tier that offers speeds above 100 Mb /second. You may not experience speed differences at this speed. However, CTF is usually necessary to achieve peak speeds at 200 Megabits/second and above.
-Note: CTF is only available for ARM Router (like RT-AC68U, RT-AC3200, R7000, ... ). MIPS RT-N router (like E4200v1, RT-N16, RT-N15U, ... ) can use Broadcom FastNAT. MIPS RT-AC router (like RT-AC66U) can not use CTF or FastNAT.
+With CTF enabled, the router starts to send out transmission frames as soon as it receives its destination. However, the router relies on the client device to tell it whether the data is corrupted for resend. This restriction can cause problems with a few common home uses. Note that enabling CTF will disable QoS and Bandwidth Limiter. This is because the switching part of the packet bypasses parts of the standard Linux iptable chains.
-**Enable Jumbo Frames *** = This option (Default: off) allows you to increase the maximum frame size within your LAN.
+When you have CTF disabled, the router will store the entire frame before sending it out to its destination. When this happens:
-**Jumbo Frame Size *** = There's a distinction between Jumbo Frames (default:off) and Jumbo Frames default set to 2000. The latter is the default size if it is enabled (otherwise ignored). Jumbo Frames is usually enabled if you frequently do intensive file transfers within your LAN. In such cases, all devices must support Jumbo Frames, and the packet size should be standardized across all devices on your LAN. It is strongly suggested you leave this off unless you have a specific requirement for it. Once you venture into Jumbo Frames, you'll have to deal with fragmentation of Internet traffic, unless the end device supports Path MTU Discovery. You may find that the limited performance benefits of Jumbo Frames is not worth the time and effort needed to tweak and troubleshoot the feature.
+  * The holding period may require more of the router's CPU time.
+  * WAN-to-LAN performance depends more on the router model in use.
+  * For example, CTF could allow you to use your FreshTomato device in a Gigabit WAN environment. On ARM devices, you can expect performance in the range of 200 to 400 Mb/s.
-[[https://wiki.freshtomato.org/lib/exe/detail.php?id=miscellaneous&media=c4a7a30918f6d23e3e448047426d2be8.png|{{:c4a7a30918f6d23e3e448047426d2be8.png}}]]
+ \\
+  * ARM Routers (like the RT-AC68U, RT-AC3200, R7000) support CTF.
+  * MIPS RT-N routers (like the E4200v1, RT-N16) can use Broadcom FastNAT
+    * FastNAT is a similar function to forward at accelerated speeds.
+  * MIPS RT-AC routers (like the RT-AC66U) do not support CTF or FastNAT.
+ \\
+**Enable Jumbo Frames * :** This option allows you to increase the maximum frame size within the LAN. (Default: Disabed).
+The default size for Jumbo Frames is 2000 bytes. If enabled, all ports (WAN + LAN) will have Jumbo Frame capability enabled.
+The jumbo frames feature is only supported in 1000 Mbit/s mode. Also, a gigabit switch uses more memory when this feature is enabled. This will influence system performance, depending on how many switch ports simultaneously use jumbo frames.
+**Jumbo Frame Size:**  If disabled, the default frame size is 2000 bytes. If this is enabled, its setting overrides the default frame size setting (Default: off).
+Generally, enable Jumbo Frames only if you frequently transfer large files within your LAN. To function, all devices must support Jumbo Frames. Additionally, the packet size should be standardized across all LAN devices.
+You are strongly advised to leave this disabled unless you have specific requirements for it. Venturing into Jumbo Frames means you'll have to deal with fragmentation of Internet traffic, unless the end device supports Path MTU Discovery. Users often find that the limited performance benefits of Jumbo Frames is not worth the time and effort needed to tune and troubleshoot it.
+ \\
+ \\
+ \\

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