[FS#1501] DS-Lite is broken on snapshot with some models

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - Tim Biermann (TimB87) 

Attached to Project - OpenWrt/LEDE Project
Summary - DS-Lite is broken on snapshot with some models
Task Type - Bug Report
Category - Packages
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - High
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Hey everybody,

my provider forces me to use ds-lite to get connection to the v4 internet.

I first tried openwrt on an old Linksys E4200, which worked with any version - but the router ran with around 50% cpu utilization at all times and it was very slow.
After updating to an Linksys WRT 3200 ACM, 17.01.4 works great!
Newest trunk though doesn't.

It also does not work on WRT 1900 ACS v2 and Netgear R7800 according to various forum posts.

I already gathered some information about it on the openwrt Forum -> https://forum.openwrt.org/viewtopic.php?id=73755

What else can I provide to make future versions work?

To mee, it seems like there is a problem with odhcp6c and maybe dnsmasq? Plus the script always produces "command not found" errors (even on the e4200), so maybe the script does not work flawlessly?

Thanks for your help!
Best regards,
Tim

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1501