He is our peace. Not: He gives us peace as an extra. He IS the peace. This means: Where Christ is, there is peace. And Christ is in you. So you already carry peace within you, even if your surroundings are turbulent.
Paul also speaks here about the wall between Jews and Gentiles that Christ tore down. Separation, hostility, categories, Christ broke through them. In the New Covenant there is one people, united in him.
Today: Peace is not far away. It lives in you because Christ lives in you.