Why??
I am an Xstream Fiber user, I do not do anything like that, I am connecting device to router like normal one. Pppoe is used to manage subscribers and only required at modem level. Mac auth is not required for simple router. Why make a simple plug and play thing so complicated?
Just connect the two lan cables,
Make sure that Airtel Xstream is in Route mode for all LAN ports( that is factory default settings btw)
Now open the admin page on tp-Link router and do the bit of initial configuration for to link router.
That is what worked for me and works for everyone.
He is only connecting a secondary router, he is not implementing some sort of server that he might need to go so much hardcore.
Once again, just plug and configure and play. No fancy settings, Mac authorisations etc. Are required.
@kg11sgbg You need to just connect lan, and then configure the tp link router from its admin page.
Just see the pics below, just check these settings and you are done.
1) On Xstream fiber
View attachment 21223
2) for TP-link
First go through the initial setup if you are using it for first time.
Then open the setting tab as shown below
View attachment 21224
Now open Operation Mode from side menu
View attachment 21225
Now click On AP Mode.
View attachment 21226
And that's it. There is no need of doing any pppoe Mac auth. Or even call the rudest cc of Airtel.
This setup does not require any backend changes.