diff --git a/examples/abilene-topology-backup.txt b/examples/abilene-topology-backup.txt
new file mode 100644
index 0000000..f4f1d43
--- /dev/null
+++ b/examples/abilene-topology-backup.txt
@@ -0,0 +1,31 @@
+12  30
+1   2   9920000 1   1   100 100
+2   1   9920000 1   1   100 100
+2   5   9920000 1176    1   100 100
+2   6   2480000 587 1   100 100
+2   12  9920000 846 1   100 100
+3   6   9920000 260 1   100 100
+3   9   9920000 700 1   100 100
+4   7   9920000 639 1   100 100
+4   10  9920000 1295 1   100 100
+4   11  9920000 2095    1   100 100
+5   2   9920000 1176    1   100 100
+5   7   9920000 902 1   100 100
+5   8   9920000 1893 1   100 100
+6   2   9920000 587 1   100 100
+6   3   2480000 260 1   100 100
+6   7   9920000 548 1   100 100
+7   4   9920000 639 1   100 100
+7   5   9920000 902 1   100 100
+7   6   9920000 548 1   100 100
+8   5   9920000 1893 1   100 100
+8   10  9920000 366 1   100 100
+9   3   9920000 700 1   100 100
+9   12  9920000 233 1   100 100
+10  4   9920000 1295 1   100 100
+10  8   9920000 366 1   100 100
+10  11  9920000 861 1   100 100
+11  4   9920000 2095 1   100 100
+11  10  9920000 861 1   100 100
+12  2   9920000 846 1   100 100
+12  9   9920000 233 1   100 100