Hi,all,
I am studying the example pyswitch.py.I am a new learner and I understand
most of them, but few lines are not clear to me.
The following lines:
dst = inst.st[dpid][srcaddr]
if dst[0] != inport:
log.msg('MAC has moved from '+str(dst)+'to'+str(inport), system='pyswitch')
I am confused that why using str(dst) not str(dst[0]), does dst[0]
represent an old inport?
Does dst[0] ,dst[1], dst[2] represent the inport, time and packet?
Additionally,should I assign the new inport to the inst.st[dpid][srcaddr]?
Just use inst.st[dpid][srcaddr][0]=inport ?
Thanks very much
Weiyang
