proc trafficMultiplier { hops } {
for {set a 1} {$a <= $hops} {incr a} {
  set c [expr $a/256]
  set d [expr $a%256]
  ios_config "interface tunnel$a" "ip addr 1.$c.$d.1 255.255.255.252"
  ios_config "interface tunnel$a" "tun sou lo0"
  ios_config "interface tunnel$a" "tun dest 2.2.$c.$d"
  }
}

trafficMultiplier 10