[FS#227] PPPoE is broken on WRT1900ACS

[LEDE Bugs]

The following task has a new comment added:

FS#227 - PPPoE is broken on WRT1900ACS
User who did this - Mathias Kresin (mkresin)

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> Usually i like to understand if it is me, or a bug. Don't want to clutter this page with all issues i run into.
Due to nobody complaining, and me "fixing" it with a reconfigure of /etc/config/network i assumed it was not a real bug...

Thanks for that! Indeed, that is the way to go and not to spam the bugtracker with support requests.

> attached there is the commands' output for the same build (working and not working version)

Okay, now I can see the real issue.

It's a bug in "set up vlans in preinit/failsafe" which is revealed by a config that differs from the default network config.

During preinit vlan support is enabled ("enable_vlan: 1" in swconfig output) since it is (now) the default for the board, but the vlan support is not disabled afterwards. Since your /e/c/network misses the vlan part, it can  neither disable vlan support nor setup the desired vlan config on it's own.

That your lan interfaces are working is more luck than expected.

For now, the best is to disable vlan support after boot. Everything should work after that using an unmodified LEDE image:


swconfig dev switch0 set enable_vlan 0
swconfig dev switch0 set apply


I will try to get in contact with the author of this change to discuss the issue. I'm not interested to commit a fix which possibly introduces a new bug.
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=227#comment660