Curious about this one.
I was on BT Infinity with a BT HH5.
Switched to PN and also switched to my own modem - its a TP-Link W9970 and i noticed there was an option for MTU when i setting everything up. The manufacturer default was 1480, not a value i heard is widely used for PPPoE connections. Anyway, i decided to change this to 1492.
Since doing so, i've experienced some occasional disruption in stability and loading. E.g. pages would hang.
I since did some more googling and arrived at 1458 as the optimal for PPPoE.
So i would like to ask, am i just imagining it or could it be the MTU, my connection seems more more stable and i've had not pauses or dropouts since. If so, have i chosen the correct value?