https://thegioimang.vn/dien-dan/threads/t%C3%ACm-hi%E1%BB%83u-giao-th%E1%BB%A9c-vrrp-virtual-router-redundancy-protocol-c%E1%BA%A5u-h%C3%ACnh-giao-th%E1%BB%A9c-vrrp.58/
https://whitehat.vn/threads/huong-dan-cau-hinh-vrrp.5722/
