Todays (14/6) build broke PPPOE-internet connection (FATAL !!)
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@louis2
That's very strange. Can you provide PPPoE log output again? -
Yep,
It is very strange and so unexpected. Thats the reason it took so long and so much effort to find the problem.
Attached the actual log. Note that I
- did set the MTU to the more common 1500;
- cleared the log;
- disabled the wan;
- enabled the the wan again.
Louis
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Hmm, I don't know is it ISP related or not, but for me it does not work.
Setting any value into MTU field does not change anything. PPPoE log shows MRU 1492 always. What if you put 1492 manually?
Re-tested. Accidentally put MTU into PPPoE settings, not WAN. Looks like with 1500 it just refuses to connect. -
For info,
At this moment I am running a build from a few hours ago. As soon as I clear the MTU field, I lose connection.
Related to the MTU value, I really do not know what is the best value because:
- the ISP is using / can use VLAN's (adding extra length to the MTU)
- the maximum MTU payload conform spec advise is 1500
- my switches are by default using 1500 (I really do not know if I should read that as 1500 with or without vlan tags!)
- 1500 is more or less the standard / the value supported every where
- however 1500 + vlan headers = 1522
So normally I tend to set the value to "1522" .... however that is probably not optimal for my own switches / not even there ...
I do not even now if the gui field is related to the MTU-pay-load or tot the bruto MTU-size
So, since I did not deep dive in this, for the moment, it go for 1500, however 1492 works as well.
Louis
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Small addition:
- I just updated to the very latest snapshot, same behavoir
- If I clear the MTU-field when connected, maybe sometimes, the interface seems to stay available for a while,
- when I reboot with an empty MTU-field, I will not have a connection
- as soon as I fill a value in the MTU-field (e.g. 1500) the connection will establisch within a few seconds
Louis
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@louis2
I am not sure what was the logic, but according to hint for this field
"If this field is blank, the adapter's default MTU will be used. This is typically 1500 bytes but can vary in some circumstances." it should use adapter's default MTU, but I think for PPPoE WAN type it should use something different.
If I type whatever I type into MTU field, for example 1500 I get[wan_link0] PPPoE: Set PPP-Max-Payload to '1500'in PPP log.
If I clear this field I don't get this line at all. Same happens if I put 1492 into this field, no payload is set, it's default.
Another one note. If I disable WAN and enable it, then my PPPoE interface changes it's parent interface to the last one in the list, I mean "Interfaces/PPPs/Edit" "Link Interface(s)" list. So my connection failed with same sympthoms as yours.
