I have a fiber connection over PPPoE. It is stable, no disconnects as I read about in other topics. However, I suspect the MTU is not set correctly.
My ISP specifies to use MSS Clamping with a value 1412 on the PPPoE interface. They ship a Fritzbox 5490 but they support using a different router and even reward that with a 2 euro discount on the monthly subscription fee. I use a Sitecom WLR-8100 running the SNAPSHOT (about a week old) ath79 firmware with Luci installed. This SNAPSHOT works on both v1.001 and v1.002 version.
The PPPoE connection is stable, no disconnects detected so far. However, sometimes a webpage or part of it loads later or not at all. I suspect issues to be MTU related.
OpenWRT support MSS Clamping in the Firewall settings. How does this actually work. And how to configure this correctly in Luci (or CLI if needed). How to configure the setting "MSS Clamping with value 1412"? I have asked my ISP if the number 1412 is a typo since 1452 makes more sense, but still, how can MSS Clamping be properly configured?
Any thoughs highly appreciated.