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--- advanced-misc [2023/09/25 17:40] – -add further depth to CTF section hogwild
+++ advanced-misc [2024/11/27 01:21] (current) – -Condense, formatting hogwild
@@ Line 1: / Line 1: @@
 ====== Miscellaneous ======
-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.
+In this menu, you can tweak some secondary, less critical settings. These settings rarely need to be modified. If you change them, make sure you understand the consequences of those changes.
-**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.\\  \\
+ \\
-{{: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.
+**Boot Wait Time * :** the time period during which you can access the router via its CFE webserver.
- \\ {{:pasted:20220428-100159.png}} \\   \\   \\ **CTF (Cut-Through Forwarding): ** If checked, this enables Level 1 NAT hardware acceleration.
+This refers to the bootstrapping portion of the process, or the loading of code before the OS loads. If you need to delay the boot process (to stay in internal webserver CFE mode), change this setting.
-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.
+In rare circumstances, such as a power outage, your modem might take longer to boot than FreshTomato does. This setting could be used to tune that until it is optimal. The asterisk (*) indicates not all hardware models support this feature.\\
-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.
+ \\
-When you have CTF disabled, the router will store the entire frame before sending it out to its destination. When this happens:
+{{:pasted:20220428-100039.png?443}} \\   \\   \\   \\ **WAN Port Speed:**  lets you set the WAN port to Autonegotiate mode or force a specific speed/duplex combination for it.
+Only 10Mbps and 100Mbps speeds can be forced. For 1Gpbs, leave it at Autonegotiate. Not all models support this feature.
+(Default: Autonegotiate).
+ \\ {{:pasted:20220428-100159.png?145}} \\   \\   \\ **CTF (Cut-Through Forwarding): ** if checked, enables Level 1 NAT hardware acceleration.
+CTF lets bridges use an alternative forwarding method for storing/forwarding frames. Enabling it may improve speeds on Internet plans with a profile above 100 Mb/second. CTF is usually necessary to reach peak speeds on plans that allow 200 Megabits/second and higher.
+With CTF enabled, the router starts to send transmission frames as soon as the full packet header has been received. However, it relies on the client to tell it whether the data is corrupted for resend. This restriction can cause problems with a few common home uses.
+ \\
+**Enabling CTF disables QoS and Bandwidth Limiter**. **It can also cause issues for IPv6 tunneling protocols, **like 6in4 Static. This is because the switching part of the packet bypasses parts of the standard Linux iptable chains.
+With CTF disabled, the router stores the entire frame before sending it out to its destination.
+When this happens:
   * The holding period may require more of the router's CPU time.
-  * WAN-to-LAN performance depends more on the router model in use.
+  * WAN-to-LAN performance will depend more on the router model.
-  * 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.
  \\
+CTF/FastNAT is supported as follows:
   * 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.
- \\
+ \\ FastNAT is a similar function that forwards frames at accelerated speeds.
-**Enable Jumbo Frames * :** This option allows you to increase the maximum frame size within the LAN. (Default: Disabed).
+On ARM devices, you can expect performance in the range of 200 to 400 Mb/s with CTF enabled.
-The default size for Jumbo Frames is 2000 bytes. If enabled, all ports (WAN + LAN) will have Jumbo Frame capability enabled.
+ \\ **Enable Jumbo Frames:** lets you increase the maximum frame size on the LAN. (Default: Disabled).
+The default Jumbo Frames size is 2 KBytes. If enabled, Jumbo Frame capability will be enabled on all LAN/WAN ports.
+This feature is supported only in 1000 Mb/s mode. Also, gigabit switches use more memory when this feature is enabled. This can affect performance, depending on how many switch ports simultaneously use jumbo frames. Not all hardware models support this feature.
+ \\
-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:** iIf enabled, this value overrides default frame size.
-**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).
+If disabled, default frame size is 2 Kbytes. (Default: off). Generally, enable Jumbo Frames if you frequently transfer large files within your LAN. To function, all devices must support Jumbo Frames. You should also standardize the packet size across all LAN devices.
-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.
+It is best to leave this disabled unless you have specific requirements for it. Using Jumbo Frames means Internet traffic will be fragmented, unless the end device supports Path MTU Discovery. Often, the limited performance benefits of Jumbo Frames isn't worth the time and effort needed to tune/troubleshoot it.
-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.
+Not all hardware models support this feature.
  \\

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