Hello, the campus offers free WIFI connection across its premises so it will be unnecessary to have a personal router. Also installation by private parties will not be allowed since the vit network is an ethernet system and has its own access limitations. You can have a personal modem if needed along with you. You can refer this link to check out other facilities in the campus

https://dqxeclau.top/university/vellore-institute-of-technology-vellore

Best wishes.