yeah, I found this thread yesterday on forum.level1techs.com and switched it off, as you said, only to see no difference.
"PPP is weird if you’re used to LAN and ethernet addressing. There’s only a single IP on the other side, and peers are originally meant to be symmetrical and not really ask for IPs using DHCP - instead, they’d just announce what IPs they have using IPCP and expect the other side to ack.
Then the whole ip address discovery thing was bolted on, so you as a peer can say, “I have 0.0.0.0”, and ISP can say “no you don’t, you have 2.64.x.x”. ISP peer can still say “I have 10.64.64.0” and you’d typically use that as a gateway.
In your routing tables, you’d have a directly attached 10.64.64.0/32 route via ppp0 as well as a 0.0.0.0/0 (default gateway) route via 10.64.64.0/32 .
[well something along those lines anyway … ppp itself is dying … but you might end up having /32 on ethernet interfaces these days instead]
My PPP log says the same now.
Thanks and best regards,
Mike