OIT Network Systems

Campus Core and Border Switches Traffic Statistics

We monitor traffic volume on selected campus core and border switch interfaces.

The core switches are those that operate at the core of the campus network; the core of the network is in fact composed of these switches and the mesh of connections among them. The border switches are those that operate at the border connecting the campus network to the Internet and Internet2.

For each monitored interface, you may view graphs showing the traffic volume in and out of that 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.

Traffic graphed as "incoming" (in GREEN) represents traffic entering the monitored network interface, while the traffic graphed as "outgoing" (in BLUE) represents traffic leaving the network interface.

We also monitor some switches for CPU load and/or free memory.

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

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

The switch interfaces we are monitoring are listed below, sorted by switch.

 

  • core switch gigagate2 (switching processor cpu) (switching processor memory):
    This device acts both as a switch (layer 2) within each VLAN, and router (layer 3) between VLANs. Only the layer 2 components are listed here; the layer 3 components appear as gigagate2 in Router Traffic Statistics.

    This device connects primarily academic buildings and offices to the campus core. The device also connects some non-princeton-net servers to the network.

    You may view a port allocation map.

    You may also view a table showing traffic volume on all interfaces ranked by Bit Rate or Packet Rate.

     

  • core switch gigagate4 (switching processor cpu) (switching processor memory):
    This device acts as both a switch (layer 2) within each VLAN, and a router (layer 3) between VLANs. Only the layer 2 components are listed here; the layer 3 components appear as gigagate4 in Router Traffic Statistics.

    This device primarily connects dormitories, apartments, and eating clubs to the campus core.

    You may view a port allocation map.

    You may also view a table showing traffic volume on all interfaces ranked by Bit Rate or Packet Rate.

     
  • host aggregation switch gigagate5 (switching processor cpu) (switching processor memory)
    This device acts as a switch (layer 2) within each VLAN.

    This device primarily connects servers located in the New South Machine Room.

    You may view a port allocation map.

    You may view a table showing traffic volume on all physical interfaces ranked by Bit Rate or Packet Rate.)

     
  • core switch swch-ppn (switching processor cpu) (switching processor memory)
    This device acts as both a switch (layer 2) with each VLAN, and a router (layer 2) between some VLANs. Only the layer 2 components are listed here; the layer 3 components appear as swch-ppn in in Router Traffic Statistics.

    This switch is the core of ppnnet, the Princeton Private Network. ppnnet is not routed to any other campus network, with the exception of permitting IP communication between one server on ppnnet and any device on vapornet. This switch is also the core of shufflnet, which is not routed to any other campus network.

    This switch is the core the VoIP service, and routes among the various subnets supporting VoIP service. It does not route those subnets to the rest of the campus network.

    This switch is the core of infranet5, and routes that subnet to the campus network.

    You may view a port allocation map.

    You may also view a table showing traffic volume on all interfaces ranked by Bit Rate or Packet Rate.

     
  • core switch mini-swch-ppn
    Under normal conditions, this switch provides no service. In the event of a disaster at 87 Prospect, this switch acts as the core of a minimal ppnnet (the Princeton Private Network) and shuffelnet.

    You may view a port allocation map.

    You may view a table showing traffic volume on all physical interfaces ranked by Bit Rate or Packet Rate.

     
  • aggregation switch gfdl-gate
    This device acts both as a switch (layer 2), and a router (layer 3). Only the layer 2 components are listed here; the layer 3 components appear as gfdl-gate in Router Traffic Statistics.

    This device acts as an aggregation switch for a number of locations at the Forrestal Campus. It also as as a router connecting GFDL's private network to the campus network. It also acts as an attachment point for PPPL's connection to the campus network.

    You may also view a table showing traffic volume on all interfaces ranked by Bit Rate or Packet Rate.

     

    Useful Collections

    The documents below collect some of the graphs above from several related devices or interfaces.

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