Yum Server on rhel7

Hello everyone
I installed rhel7 and this server functions as yum server, I set up a repo for rhel7 and everything works properly including repo synchronization
What I am asking is whether it is possible for Rhel7 to set up a repo of Rhel6 and synchronize it in front of the Red Hat.
I also did subscribe manager in front of red hat and I see the repo related to rhel7, can also subscribe to rhel6 so that i can stencil the repo of rhel6.
Thx
David.