build a loop, but fail to test

[PeiTheFarmer]

I tried to build a loop with
S#
127.0.0.1:127.0.0.2
127.0.0.2:127.0.0.1,127.0.0.3,127.0.0.5,127.0.0.6
127.0.0.3:127.0.0.2,127.0.0.4
127.0.0.4:127.0.0.3,127.0.0.5
127.0.0.5:127.0.0.4,127.0.0.2
127.0.0.6:127.0.0.2,127.0.0.7
127.0.0.7:127.0.0.6
H#
127.0.0.101:127.0.0.1
127.0.0.102:127.0.0.2
127.0.0.103:127.0.0.3
127.0.0.104:127.0.0.4
127.0.0.105:127.0.0.5
R#
127.0.0.1-127.0.0.7/32-127.0.0.2
127.0.0.2-127.0.0.7/32-127.0.0.3
127.0.0.3-127.0.0.7/32-127.0.0.4
127.0.0.4-127.0.0.7/32-127.0.0.5
E!

just like
1-2 - 6 - 7
// \
5 3
\ //
4

and I add a rule A#127.0.0.5-127.0.0.7/32-127.0.0.2
I suppose there should be a loop, but you code tells me the network is well formed, is it a bug or my mistake? thank you.