Hi, next_hop_ is defined in packet.h, However, how to get the value for it? Thanks. Nice weekend, Yuxi ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Yuxi LI * 59#, Dept of Computing Science (780)492-7747(Lab) * University of Alberta (780)492-5150(Office) * Edmonton, Alberta www.cs.ualberta.ca/~yuxi * Canada T6G 2E1 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~