Malone Move Network Info

The network at Malone Hall will be a little different than the one currently active in Croft Hall and Shaffer Hall. This page documents what you need to know and what you need to do to move your systems between the two.

About the Network

In Malone Hall, there will be two faculty/graduate networks:

Public Grad Net - Uses IP addresses that are accessible from the Internet (like the current Grad Net in Croft/Shaffer)

Private Grad Net - Uses IP addresses that are only accessible from within the Hopkins network (and Hopkins VPN).

Each CS network jack in your new Malone office will go to exactly one of those two networks, so care will be needed to connect your computers into appropriate jacks. (If you have a system that will reside in the Malone server room instead, info can be found here.)

Any given network jack can be changed from one network to the other (i.e., public to private or private to public) with relatively little difficulty with an emailed request to CS Support. JHU Networking will be administering the network; here is their current plan:

Even-numbered jacks will be connected to the Public CS Grad network

Odd-numbered jacks will be connected to the Private CS Grad network.

We anticipate that a number of these network jacks will need to be reconfigured as part of the move-in process. Again, such changes can be effected by emailing support@cs.jhu.edu with the jack number and the network to which it should be connected (Public or Private.)

Any system on one of the networks will be able to communicate with systems on the other network. This means that you can, for example, print from a server on the public network to a printer on the private network.

Your New IP Addresses

To see your new IP address assignments, please consult the "New Network Addresses" page. You will have to log in with your JHED ID before you can see the page.

What You Need to Do

To ensure that the transition is smooth and effective, we'll need a few items from you.

First, please arrange to visit your space in Malone Hall at least a couple of days before your move. Figure out where your computers will be going, and determine whether the default network jack assignments will work for you. Again, even-numbered jacks will be connected to the public CS Grad Network and odd-numbered jacks will be connected to the private CS Grad Network. If you need some jacks changed, please email support@cs.jhu.edu as soon as possible with the jack numbers and the networks (Public or Private) to which they should be connected. Be aware that we will forward your request to JHU Networking, so we must wait until they perform the change. So, try to check your new spaces as soon as it is made available to you.

Next, please let us know when you will be moving, as precisely as possible. We would ideally like to know the date on which your computers will be moving, the time you will be shutting them down, and the time you expect to be turning them back on. You see, although your Malone IP address is assigned to you prior, we can't have same .cs.jhu.edu hostname assigned to different IPs between the two different buildings (Croft/Shaffer and Malone) at the same time. So, we must plan to make DNS hostname mapping changes during the time the systems are off, so that by the time they're back on again in Malone, their DNS hostnames will point to their new Malone IP addresses. To provide us this timing info and to coordinate the DNS hostname mapping changes, please email support@cs.jhu.edu (and not our individual CS IT staff members.)

Finally, you will need to make sure your systems are configured with their new network information. If you indicated that you will be using DHCP in Malone Hall, all you need to do is connect your systems to appropriate network jacks (even/public; odd/private), and turn them on. They should get all of the correct information automatically. You can check the "New Network Addresses" page to see whether we believe you will be using DHCP or not.

NOTE: If you plan to use DHCP but you haven't set it up yet, you can do so right now; our Croft/Shaffer DHCP server has been configured to serve the current Croft/Shaffer IP addresses for everyone who indicated that they'd be using DHCP.

If you will not be using DHCP at Malone Hall, you will have to configure your computers manually when you get to Malone. Use the IP address listed for your computers on the New Network Addresses page and the rest of the network information listed on the Connecting To The CS Grad Net Without DHCP page.

Additional Considerations for Servers Residing in the new Malone Server Room

There are no network jacks in the new Malone server room (Malone Hall Room G-29). Network cables will be run from above to the server racks. If you will be putting servers into the server room that need to be on one of the CS networks (public or private), you will need to discuss your network needs with the JHU Networking group as soon as possible. In most cases, they should be able to run a single cable from their network rack to your systems rack for each network you need to use. (So if you have a rack containing devices using both public and private addresses, they'll run two cables, one for the public network and one for the private network.) You will probably need to connect that cable to your own switch on your rack and then plug your servers into that switch.

Again, if you have special networking needs for servers you're hosting in the new Malone server room, you need to contact JHU Networking directly to discuss those needs as soon as possible, so that they are prepared come move-in time.

Our current JHU Networking Contacts for the Malone move include:

Karen Pringle
410-516-2025
kpringl2@jhu.edu

John Etheridge
410-516-8162
jetherid@jhu.edu

Email is probably the best way to contact Karen and John, and if you e-mail one of them, please cc: the other. You can also cc: support@cs.jhu.edu so that we have a record of any network changes.