Hi lagapides
Thanks for your feedback
Let’s suppose PE1 ping 4.4.4.4 and get packet which has destination (4.4.4.4) mean PE2, in this case PE1 will put label on NH (192.1.23.3) basis or destination address ( 4.4.4.4). If it put label on basis of destination address, then in Rene example router checking NH in order to reach (4.4.4.4). So my confusion why router checking NH and some time destination.
Second : when normal ip packet come to PE1, how PE1 knows that it’s should go via MPLS and need to Check LFIB for label, even packet has no label at this stage, just normal packet. If P router receive packet it make sense that I received labeled packet and need to check LFIB.
Will be thankful for your reply