I think @grisu provided links a few days ago, GNUton cannot work on DSL-AC88U as DSL-AC88U code was (poor) hopefully @grisu will be online later and help update us all But I hope I am out of date and he has changed his mind
Here another interesting post from GNUton, which DSL-routers could be supported:
I’ve tried this on my RT-AC3200 and I can’t ever get the AIMesh to show up in the GUI. Given a recent update to that router’s Merlin code, I wonder if he eliminated this altogether? Any knowledge out there?