I am in the process of restructuring our network infrastructure with the new design . what is the best standard approach to have redundancy in mind
10 story building with 3 columns . Our IT room located in the 4th floor and having two manage high end switches in the core level . second one is not live but it has the same configuration . most of the floor are having fiber single core ones . one of my friend told me to go with 2 or 4 core to have redundant . I did not understand the redundancy with one cable with 2 0r 4 core one will help .I got to know is batter to have two cables fiber connection to each floor and then distribute within the floor .
please advice me on the best practice on the above implementation .