link from 1.2.3.4 to 1.2.3.5 added
duplication of 1.2.3.5 to 1.2.3.4
link from 1.2.3.5 to 1.2.3.6 added
duplication of 1.2.3.6 to 1.2.3.5
link from 1.2.3.6 to 1.2.3.7 added
duplication of 1.2.3.7 to 1.2.3.6
link from 1.2.3.7 to 1.2.3.4 added
duplication of 1.2.3.4 to 1.2.3.7
link from 1.2.3.5 to 1.2.3.7 added
duplication of 1.2.3.7 to 1.2.3.5
the nodes are: 1.2.3.4, 1.2.3.5, 1.2.3.6, 1.2.3.7
the links are: 1.2.3.4=1.2.3.5,1.2.3.4=1.2.3.7,1.2.3.5=1.2.3.6,1.2.3.5=1.2.3.7,1.2.3.6=1.2.3.7
a shortest path from 1.2.3.4 to 1.2.3.6 is: 1.2.3.4 => 1.2.3.7 => 1.2.3.6