OIT Network Systems

Server Traffic Statistics

We monitor traffic volume for selected hosts, mostly OIT hosts that function as servers for a variety of major campus services. We may also do so for some departmental hosts located in OIT machine rooms.

We normally collect traffic data from the network infrastructure (e.g. an Ethernet switch) to which the host is attached, as opposed to collecting the data directly from the host. As a result, the traffic graphed as "incoming" (in GREEN) represents traffic entering the network port from the host, while the traffic graphed as "outgoing" (in BLUE) represents traffic leaving the network port to to the host. (In the few cases where we instead collect the data directly from the host, we swap the data we receive, so "incoming" and "outgoing" still are graphed from the perspective of the network infrastructure.)

For each monitored host, you may view graphs showing the traffic volume in and out of the corresponding network interface over several recent time periods (the past 31 hours, 8 days, 31 days, and 365 days). In most cases, volume is measured by bit rate and packet rate.

The monitoring is performed with mrtg, rrdtool, and mrtg-rrd.

Except where noted otherwise, links listed below are attached to VLAN 128 (princeton-net).

In a few cases, we also monitor other statistics provided by the server.

The display you see will be refreshed automatically by your Web browser every five minutes.

Some of the hosts below have been grouped roughly by the service they provide. The remainder appear in a Miscellaneous group at the end. If you administer one of the servers below and believe it is listed in the wrong group, or that the name is no longer correct (we use canonical Host Database names based upon the device's hardware address), contact networking@princeton.edu . This page is manually maintained, so adds, moves, deletions, and changes to devices may not be reflected here until you advise us. Be advised that we rely on each device's hardware address to determine the name that appears below and on the graphs; it is important that the hardware address be accurately registered in the Host Datbase to avoid mis-labelled information below.

If you adminster a server that is missing from this page, and the server is located in the 87 Prospect Avenue Machine Room or the New South Machine Room, please contact networking@princeton.edu to have it added to this page.

The OIT ESS Systems group also collects performance data from all UNIX servers they maintain; see OIT System Performance (access is restricted).

A service of OIT Network Systems
The Office of Information Technology,
Princeton University