Hi,
This task says
- Configure R4, R5 and R6 so that the only labels advertised by LDP are the ones for the Looback 0 interfaces of the mentioned routers.
The SG permits the whole loopback range (150.x.0.0/16). I just permitted the loopbacks of R4, R5 and R6. I think the wording is a bit wrong or SG is too loose with its ACL.