Your subnet mask is not allowing you to see other subnets on the network.
In routing, the network mask tells your computer what IPs it can see. In your case, your subnet mask is probably set to
255.255.255.0, which only allows your computer to see IPs on the
172.31.54.x subnet. To tell your computer to see IPs on the
172.31.x.x subnet, you'll have to set your netmask to
This quick guide will tell you how to set your netmask. You'll need to know your IP address and the default gateway assigned to your connection.
- You'll have to go into the Network and Sharing center: bring up this menu by right clicking your connection icon, then selecting "Open Network and Sharing Center".
- Click on change adapter settings in the left column:
- Right click your connection and select properties:
- Left Click Internet Protocol version 4, then left click properties:
- Click "Use the following IP address", and input your assigned IP, (ex.
172.31.54.22) the netmask,
255.255.0.0 (Windows should auto complete), your gateway (ex.
172.31.54.1) and finally DNS servers (use the DNS IPs in the screenshot).
- You should now be able to find all of those servers on the campus LAN.