Network Setup

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Main Ideas

The cslab's networking equipment is split into several categories: External, COSI Internal, ITL Internal, and Server Room Internal. In the spring of 2011, the wiring organization and layout of the lab's network setup was redesigned by Christian Mesh, who was advised by Mathew S. McCarrell.

External Network

This network allows the cslabs to connect to the outside world via OIT's infrastructure.

Basics

The connection to OIT is provided via a Gigibit CAT 5 cable. That CAT 5 cable plugs into OIT switch 1's first Gigabit port. A patch cable connects OIT switch 1's second Gigabit port to OIT switch 2's first port. OIT switch 2's port 2 is then used to provide a Gigabit connection to Mirror. In addition, cslab's external switch 1 & 2 are connected to OIT switch 2's port 21 and 18, respectively.

DHCP/DNS

OIT provides dynamic DHCP/DNS to the labs on the 128.153.144.* subnet. All machines using DHCP in the labs receive a host name of <name>.sclab.clarkson.edu. We also have some static IPs reserved on the 128.153.144.* subnet for our lab PCs to use.

See List of Static IPs - 144 Subnet for more information on the static IPs used on the 128.153.144.* subnet. See List of Static IPs - 145 Subnet for more information on the static IPs used on the 128.153.145.* subnet.


COSI Internal Network

COSI's internal network is used to connect all of the lab PCs and most of our servers to an isolated Gigabit network. This network is primarily used for projects and cloning the lab.

DNS

DNS is provided for the internal network by Dns1 & Dns2. All DNS entries are <name>.int.cslabs.clarkson.edu.

See [List of Static IPs - Internal_Network] for more information


ITL Internal Network

ITL's internal network is used to connect all of the lab PCs to an isolated Gigabit network. This network is primarily used for projects, class demonstrations, and cloning the lab. The network consists of 2 Gigabit switches. Switch 1 has ITL 1 to 12 on ports 1 to 12, a cable to COSI's internal network on port 13, and a patch cable to the switch 2 on port 24. Switch 2 has ITL 13 to 24 on ports 13 to 24, ITL 25 on port 5, ITL TS on port 1, ITL GS on port 23, and the patch cable to switch 1 on port 12.

Port Layout

ITLINTSW.jpg

DNS

See List of Static IPs - Internal Network for more information


Server Internal Network

This network is used to connect COSI's servers with a secure Gigabit connection.

DNS

DNS is provided for the server room network by Dns1 & Dns2. All DNS entries are <name>.sr.cslabs.clarkson.edu.


Patch Panels

The patch panels provide an easy way to tie ports around the room into different switches and keep track of them easily.

COSI

explanation

ITL

explanation

Wiring Idiosyncrasies

There are several small organizational ideas that were implemented to make changing and following cables easier:

1. Patch cables in the front of the black ducts, server and misc cables in the back.

2. The internal networks use green cable and the external network uses blue. There are several exceptions that should eventually replaced.

3. Groups of patch cables are generally bundled together because they are near each other on the patch panel.


Layout

This is a basic layout of where the switches are located in the two server room racks

NetworkReorg.jpg