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.

Except where noted otherwise, links listed below in bold operate at 1000Mbs full-duplex, links not listed in bold operate at 100Mbps full-duplex.

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.