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Image Legend - LIFEGUARD

Image Legend

Legend
Graph legend:
  • Edges use the following colors and line types:
    • spoofed traceroute is blue
    • traceroute is black
    • reverse traceroute is red
    • Dotted edges represent historical paths, solid edges represent measured paths.
  • The shape of a node denotes whether it is historically pingable. 
    • Ellipses are historically pingable
    • Diamonds are not historically pingable
    • Boxes are not in the pingability database.
  • The color of a node denotes which AS it belongs to. When we can't resolve the ASN for a particular node, we color it black.
  • The outline of a node denotes whether it is currently pingable.
    • solid outlines mean that the hop is pingable
    • dashed outlines mean the the hop is not pingable from the source, but pingable from other VPs
    • dotted outlines mean that the hop is not pingable from anywhere
  • The order of measurements is:
    • spoofed pings towards source
    • spoofed traceroute towards destination
    • normal traceroute
    • spoofed reverse traceroute
    • pings towards intermediate hops / destination