50.1.2 Nodes

The nam trace format defining node state is:
n -t time -a src-addr -s src-id -S state -v shape -c color -i l-color -o color
"n" denotes the node state.
Flags "-t" indicates time and "-a" and "-s" denotes the node address and id.
"-S" gives the node state transition. The possible state transition values are:

• UP, DOWN indicates node recovery and failure.
• COLOR indicates node color change. If COLOR is given, a following -c <color> is expected which gives the new color value. Also, flag -o is expected so that backtracing can restore the old color of a node.
• DLABEL indicates addition of label to node. If DLABEL is given, a following -l <old-label> -L <new-label> is expected that gives the old-label, if any (for backtracing) and current label. Shape gives the node shape. The color of a node label can be specified via the -i flag.

"-v" is the shape of the node. The possible values are:

• circle
• box
• hexagon

As an example, the line
n -t * -a 4 -s 4 -S UP -v circle -c tan -i tan
defines a node with address and id of 4 that has the shape of a circle, and color of tan and label-color (-i) of tan.