Wear your track shoes! I hope you are fit. My 2hr layover became a 1hr layover due to inbound delay. Going from T2 to T1 was stressful. It was quite a walk through T2 to get to the tram T2->T1. Then the security at the gate. I was the last one to board. I was stressed, hot, and sweaty. Not the condition I want to be in starting a 10+ hr flight.