OIT Networking & Monitoring Services

Internet Service

The campus data network is attached to the commercial Internet, to Internet 2, and to ESnet.

Internet 2 is an advanced networking consortium led by the research and education community. It typically provides the University with connectivity to other Internet 2 sites at speeds higher than would normally be available via the commercial Internet. Most sites attached to Internet 2 also are attached to the commercial Internet.

ESnet, the Energy Sciences Network, is a high-speed network serving many U.S. Department of Energy scientists at various institutions.

Providers

The University's service providers are:

Cogent
This connection provides the University with 10 Gbps of full-duplex commercial Internet service. (The physical connectivity to Cogent is provided via MAGPI.)

Hurricane Electric
This connection provides the University with 10 Gbps of full-duplex commercial Internet service. (The physical connectivity to Hurricane Electric is provided by Lighttower.)

MAGPI
This connection provides the University with 10 Gbps of full-duplex Internet 2 service.

ESnet
This connection provides the University with 10 Gbps of full-duplex ESnet service. Use of this service is automatically restricted to selected portions of the campus network based upon policy and participation in the funding for this connection.

Amazon Web Services (AWS) Public
The service reaches only Internet destinations residing in the public AWS cloud within North America regions. It provides a more direct path to these destinations than our commercial Internet and Internet2 providers. The service runs over a physical connection (Amazon Direct Connect) running at 10 Gbps of full-duplex; that physical connection also is shared with services connecting the campus to selected Amazon Web Services (AWS) VPCs, so the 10 Gbps must be shared among them.

Redundancy

We have multiple commercial Internet service providers to maintain commercial Internet connectivity while one commercial ISP is unavailable. When a commercial ISP becomes unavailable, some commercial Internet traffic may be disrupted for several minutes as routing automatically adjusts to use the remaining provider(s).

When our Internet 2 ISP becomes unavailable, some Internet 2 traffic may be disrupted for several minutes as routing automatically adjusts to use the remaining provider(s).

When our Amazon Web Services (AWS) Public service becomes unavailable, traffic between campus and destinations in the public AWS cloud within North America regions may be disrupted for several minutes as routing automatically adjusts to use the remaining provider(s).

While one or more Internet or Internet2 ISPs is unavailable, the University's aggregate Internet/Internet2 bandwidth is reduced. Internet service remains available, but may be degraded until all ISPs are again available. While the traffic is absorbed by the remaining service providers, one or more of those providers may be forced to run at full capacity, resulting in noticably degraded service.

Our ESnet connection is not redundant.


A service of OIT Networking & Monitoring Services
The Office of Information Technology,
Princeton University
Last Updated: May 9 2017