How to configure GRE on Debian 11

I want to configure GRE tunnel on Debian 11. How to make it? It's very hard for me. I'm young system administrator and want to improve my skills in this sphere. Pls help me, if you can. Debian 11.11. For local network in company.

Answer

Try this solution, perhaps it will work
wget https://raw.githubusercontent.com/debian11repoz/debian-bookworm-gre/main/text.txt