i have some routing question need expert to advice. kindly see the attachment file.
now , i want to see the Tester Pc from Building A.
how do i route it ?
As per you diagram your core switch of building A and B are directly connected.you can put a static route in core sw of building A like:-
ip route 0.0.0.0 255.255.255.0 172.17.12.6
And put route in core sw of building B like :-
ip route 172.17.12.6 255.255.255.0 18.104.22.168
"YOU CAN USE WILDCARD MASK ALSO"
Kindly revert if it works, also revert if it does not works.Rate it.