For whatever reason my MTU value seems to be set at 1452 from the ECI modem/HH3, any idea why this would be the case rather than 1492?
More importantly is there any way to change this as I'm convinced this is too low and would like to try the default of 1492 for PPPoE as my downloads seem to be quite erratic?
the MTU for BT router will be set automatically at 1500 on the computer side for FTTC (WAN socket I am sure you know there is software that can adjust these settings
MTU adjustments where needed sometimes on the old ADSL routers, not needed for Fibre these days !
you can change the windows side of the MTU back to 1500 using this , open up the comman prompt as administrator
netsh interface ipv4 set subinterface "Local Area Connection" mtu=1500 store=persistent
It is because it is a PPPoE connection where there is an 8 byte overhead for the protocol.
He mentioned that, he believe it's set to 1452 instead of being at 1500 (1492).
From MySpeed quality Test:
As you can see this is reporting an MTU of 1452, the windows side as stated is 1500. I'm getting massive amounts of TCP idle time, this is actually lower than usual. Any ideas why it is not defaulted to 1492?
Not a clue, changing the win7 MTU to match might help you a little.
You could try a hard reset, holding the reset button for 10+ seconds.