How to set up Asterisk under Rostelecom via PPPoE?

Question

Asterisk

Greetings, Comrades!
Quite a lamer question in terms of centos 7.2 and Asterisk (naked). It is planned to switch from analogue to digital. Now a bunch of VoIP gateway + TDA200. I will refuse this in favor of Asterisk and I am interested in the question of how to stir up a PPPoE connection on it. Googled on this topic and found a couple of options. There is not much time for testing, so I would like to do the right thing to the maximum.
There is a server with two interfaces, one will look at the Vlan locale for IP telephony (only telephony, nothing else) and the second will look towards Rostelecom. As I understand it, I just need to raise the dial-up on centos, by some "rp-pppoe" - here's the manual, sort of like. But I'm interested in the asterisk settings, because I'm not very rummage in it yet, and only in training. There it will be necessary to prescribe some static routes to the specified interface?
In addition to the fact that I will register every number that we have as a separate registrar.
PS I would be very grateful for some thread of a rough plan of what I need to do. While I understand that I need the following:
1. Raise pppoe on a free centos interface
2. Register individual numbers in sip.conf
3. Draw a dial plan for external numbers in extension.conf.
4. ???

Answer 1

In sip.conf, in the "general" section, in the "externip" parameter, specify the IP address of your PPPoE interface, and the address(es) of the local network:
[general]
externip = 200.201.202.203
localnet=192.168.0.0/255.255.255.0
localnet=172.16. 1.0/255.255.255.0

Answer 2

https://www.youtube.com/channel/UCK5MedKoNJ5aRahfG...