Techniques for transmitting SONET/SDH traffic over an Advanced Switching compatible switch fabric. In one implementation, SONET/SDH traffic may be aggregated and encapsulated into Advanced Switching compatible packets. In one implementation, the contents of the Advanced Switching compatible packets may be configurable and directions on how to unpack the Advanced Switching compatible packets may be transmitted to end point nodes. In one implementation, SONET/SDH pointer justification generation may be divided between a source node which transmits SONET/SDH traffic to the switch fabric and an end point node which receives SONET/SDH traffic from the switch fabric.