MPLS basic question

[mainstreetexpress]

I have a test lab for a basic MPLS network. On my PE routers I did show mpls forwarding-table and got

ROUTER_3#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 16 10.1.1.0/30 0 Se3/0 point2point
17 Pop tag 10.1.1.4/30 0 Se3/0 point2point
18 Pop tag 10.1.1.8/30 0 Se3/0 point2point
19 17 10.10.10.1/32 0 Se3/0 point2point
20 18 10.10.10.2/32 0 Se3/0 point2point
21 Pop tag 10.10.10.3/32 0 Se3/0 point2point
22 20 10.1.1.12/30 0 Se3/0 point2point
23 21 10.10.10.4/32 0 Se3/0 point2point

Everything seems OK except the first line where it states that to reach 10.1.1.0/30 network both in and outbound tag is 16. Is there a normal explanation for this?

 

[NetEng631]

Not sure. I haven't done MPLS in a while. Is the link a transport link. Meaning if the link is just passing through the switch it doens't really matter what in in/coming and out/going tags are. Fro what I remember they are locally significant to the interface .