Pppoe subnet /29 - how to route traffic with different outgoing IP?

Question

linux

The provider issues 4 addresses on the pppoe interface, by default xxx164 is ALWAYS assigned. I add addresses to the interface:
ip addr xxx165 dev ppp0
ip addr xxx166 dev ppp0
ip addr xxx167 dev
ppp0 or 167?
the route is also assigned by default:
xxx128 dev ppp0 proto kernel scope link src xxx164
If I delete this route, or do a replay, the route through 164 remains in the cache, but there is no more ip show cache in the kernel. How can I still make the traffic go from where I want, and not from Debian?