# normal state: all links in # working condition traceroute -In 10.4.1.25 1 10.3.1.21 # primary VPN # router site 3 2 172.16.0.8 # primary VPN # router site 4 3 10.4.1.25 # target host # in site 4 # Problem: First link broken # and network has converged traceroute -In 10.4.1.25 1 10.3.1.22 # backup VPN # router site 3 2 172.16.1.7 # backup VPN # router site 4 3 10.4.1.25