FreshTomato Wiki

User Tools

Site Tools

Trace: • advanced-misc
advanced-misc

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
advanced-misc [2026/07/18 17:57] – pedroadvanced-misc [2026/07/23 18:35] (current) – -Clarity, condense, formatting hogwild
Line 1: Line 1:
 ====== Miscellaneous ====== ====== Miscellaneous ======
  
-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.+In this menu, you can tweak some more minor settings. These rarely need to be modified. If you change them, make sure you understand the consequences of those changes.
  
  \\  \\
Line 9: Line 9:
 This refers to the bootstrapping portion of the process, or the loading of code before the OS loads. Change this setting if you need to delay the boot process (to stay in internal webserver CFE mode). This refers to the bootstrapping portion of the process, or the loading of code before the OS loads. Change this setting if you need to delay the boot process (to stay in internal webserver CFE mode).
  
-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.\\+Rarely, such as in a power outage, your modem might take longer to boot than FreshTomato does. This setting can be used to tune that until it is optimal. The asterisk (*) indicates not all hardware models support this feature.\\
  
-{{:clipboard01.jpg?400}} \\   \\   \\   \\ **WAN Port Speed:**  lets you set the WAN port to Autonegotiate mode or force a specific speed/duplex combination for it.+ \\ 
 + 
 +{{:pasted:20220428-100039.png?443}} \\   \\   \\   \\ **WAN Port Speed:**  lets you set the WAN port to Autonegotiate mode or force it to use a specific speed/duplex combination.
  
 Only 10Mbps and 100Mbps speeds can be forced. For 1Gpbs, leave it at Autonegotiate. Not all models support this feature. Only 10Mbps and 100Mbps speeds can be forced. For 1Gpbs, leave it at Autonegotiate. Not all models support this feature.
Line 19: Line 21:
  \\ {{:pasted:20220428-100159.png?145}} \\   \\   \\ **CTF (Cut-Through Forwarding): ** if checked, enables Level 1 NAT hardware acceleration.  \\ {{: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.+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. It is usually necessary to reach peak speeds on plans of 200 Mb/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.+With CTF enabled, the router sends transmission frames as soon as it receives the full packet header. 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 / Bandwidth Limiter**. It can also cause issues for IPv6 tunneling protocols,** **like 6in4 Static.+For example: //**Enabling CTF disables QoS / Bandwidth Limiter**//.
  
-This is because the switching part of the packet bypasses parts of the standard Linux iptables chains.+CTF can also cause issues with IPv6 tunneling protocols,** **like 6in4 Static, because the switching part of the packet bypasses parts of the standard Linux iptables chains.
  
 With CTF disabled, the router stores the entire frame before sending it to its destination. With CTF disabled, the router stores the entire frame before sending it to its destination.
Line 34: Line 36:
  
   * The holding period may require more of the router's CPU time.    * The holding period may require more of the router's CPU time. 
-  * WAN-to-LAN performance will depend more on the router model.+  * WAN-to-LAN performance may depend more on the router model.
  
  \\  \\
Line 45: Line 47:
   * MIPS RT-N routers (like the E4200v1, RT-N16) can use Broadcom FastNAT   * MIPS RT-N routers (like the E4200v1, RT-N16) can use Broadcom FastNAT
   * MIPS RT-AC routers (like the RT-AC66U) do not support CTF or FastNAT.   * MIPS RT-AC routers (like the RT-AC66U) do not support CTF or FastNAT.
 +
 + \\
  
 On ARM devices, you can expect performance in the range of 200 to 400 Mb/s with CTF enabled. On ARM devices, you can expect performance in the range of 200 to 400 Mb/s with CTF enabled.
Line 52: Line 56:
 **Enable Jumbo Frames:** lets you increase the maximum frame size on the LAN. (Default: disabled). **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.+The default Jumbo Frames size is 2 KB. If enabled, Jumbo Frame capability will be enabled on all LAN/WAN ports. This feature is supported only in 1000 Mb/s mode.
  
-This feature is supported only in 1000 Mb/s mode. Also, gigabit switches use more memory with this feature enabled. This can affect performance, depending on how many switch ports simultaneously use jumbo frames. Not all hardware models support this feature.+Gigabit switches use more memory with this feature enabled. This can affect performance, depending on how many switch ports simultaneously use jumbo frames. 
 + 
 +Not all models support this feature.
  
  \\  \\
Line 62: Line 68:
 If disabled, default frame size is 2 KB. (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. If disabled, default frame size is 2 KB. (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.
  
-It's 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. +Leave this disabled unless you have specific requirements for it. Unless the end device supports Path MTU Discovery, using Jumbo Frames means Internet traffic will be fragmented. Often, the limited performance benefits of Jumbo Frames isn't worth the time and effort needed to tune/troubleshoot it.
- +
-Not all hardware models support this feature. +
- +
-** ** +
- +
-**TCP MSS Clamping:** +
- +
-TCP MSS Clamping adjusts the Maximum Segment Size of forwarded TCP connections on WAN and VPN interfaces to match the discovered path MTU. +
- +
-This helps avoid MTU-related connection problems, especially on PPPoE links, VPN tunnels, IPv6 tunnels, or networks where ICMP fragmentation-needed messages are blocked.+
  
-Disabling this option reduces the number of firewall rules and may slightly improve performance on low-end routers, but can cause connection stalls or TLS handshake timeouts on links with reduced MTU.+Not all models support this feature.
  
-Recommended setting: enabled, unless MTU/MSS is handled manually or the network is known to work reliably without MSS clamping.\\+** **\\
  
 **Port Health:** Since r2025.5, this watchdog counts errors on Ethernet connections and takes a defined action when an exception is spotted. **Port Health:** Since r2025.5, this watchdog counts errors on Ethernet connections and takes a defined action when an exception is spotted.
  
-This function was introduced to prevent a bad  Ethernet cable to take your router down (eating up CPU cycles) and  making the device unresponsive.+This function was introduced to prevent a bad Ethernet cable to take your router down (eating up CPU cycles) and making it unresponsive.
  
  \\ \\ {{port_health.png?591}}  \\ \\ {{port_health.png?591}}
Line 88: Line 84:
 **Enable:** runs the porthealth process to monitor the defined ports scope, every minute. **Enable:** runs the porthealth process to monitor the defined ports scope, every minute.
  
-The check is extremely lightweight and executes in about 0.02 - 0.04 seconds.+The check is lightweight and executes in about 0.02 - 0.04 seconds.
  
  \\  \\
Line 114: Line 110:
  \\  \\
  
-**Max Errors / Minute **AKA: "threshold". The number of acceptable errors per minute before an action (defined under Mode) is triggered.+**Max Errors / Minute **AKA: "threshold". How many acceptable errors per minute before an action (set under Mode) is triggered.
  
-Under most circumstances, you'd expect the number of errors to be "0". However, in certain cases, it can be advisable to add a little tolerance to deal with temporary situations like interference, temperature, etcetera.+Usually, you'd expect the number of errors to be "0". However, in certain cases, it can be wise to add some tolerance to deal with temporary situations like interference, temperature, etcetera.
  
  \\  \\
  
-**Hold Time: **acts as "cooldown" and "efficiency" filter to prevent the script from making erratic or unnecessary changes to network ports.+**Hold Time: **acts as "cooldown" / "efficiency" filter to prevent the script from making erratic or unnecessary changes to network ports.
  
-In this context, it is ideal for the router to have a "calm” decision-making process. When a port shows errors, the script steps down the link speed (say, from 1000FD to 100FD). The Hold Time ensures the system stays at the new speed long enough to see if the errors stop. If the script runs again before the 180 second (default) has passed, it will skip further down-stepping for that specific port, giving the hardware time to stabilize.+In this context, the router should ideally have a "calm” decision-making process. When a port shows errors, the script steps down the link speed (say, from 1000FD to 100FD). The Hold Time ensures the system stays at the new speed long enough to check if the errors stop. If the script runs again before the 180 second default has passed, it will skip further down-stepping for that specific port, giving giving the hardware time to stabilize.
  
  \\  \\
  
-**Cache TTL** - defines how often the script performs the "heavy lifting" of scanning router hardware to know which ports are active.+**Cache TTL** - how often the script performs the "heavy lifting" of scanning router hardware to learn which ports are active.
  
-Identifying which ports are active involves more than just scanning them individually for errors. The script saves the list of active ports to a file in: "/tmp".  By default, it will reuse that list (only) for 1800 seconds (30 minutes). It only rescans the hardware if the cache file is older than the TTL or if  the file is missing. This parameter doesn't affect the ultra-light scan for errors on active ports, happening every minute.+Identifying which ports are active involves more than just scanning them individually for errors. The script saves the list of active ports to a file in: "/tmp".  By default, it will reuse that list (only) for 1800 seconds (30 minutes). It only rescans the hardware if the cache file is older than the TTL or the file is missing. This parameter doesn't affect the ultra-light scan for errors on active ports, (occurring every minute).
  
  
advanced-misc.1784393870.txt.gz · Last modified: by pedro

Page Tools

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki