+-------+                             +-------+
              |PCC    |                             |  PCE  |
              |ingress|                             +-------+
       +------|       |                                 |
       | PCC  +-------+                                 |
       | transit| |                                     |
+------|        | |                                     |
|PCC   +--------+ |                                     |
|egress  |  |     |                                     |
+--------+  |     |                                     |
    |       |     |                                     | New Path 
    |<------ PCInitiate,CC-ID=XX,PLSP-ID=1 -------------| for LSP 
    |       |     |                                     | trigger 
    |--------PCRpt,CC-ID=XX,PLSP-ID=1------------------>| new CCI
    |       |     |                                     |
    |       |<------PCInitiate,CC-ID=YY1,YY2,PLSP-ID=1--| Label
    |       |     |                                     | download
    |       |-------PCRpt,CC-ID=YY1,YY2,PLSP-ID=1------>| CCI
    |       |     |                                     |
    |       |     |<----PCInitiate,CC-ID=ZZ,PLSP-ID=1---| Label
    |       |     |                                     | download
    |       |     |-----PCRpt,CC-ID=ZZ,PLSP-ID=1------->| CCI
    |       |     |                                     |
    |       |     |<---PCUpd,PLSP-ID=1,PST=2,D=1--------| PCECC
    |       |     |    SRP=S                            | LSP Update
    |       |     |                                     |
    |       |     |---PCRpt,PLSP-ID=1,PST=2,D=1-------->| Trigger
    |       |     |       (SRP=S)                       | Delete 
    |       |     |                                     | former CCI
    |       |     |                                     |  
    |<-------PCInitiate,CC-ID=X,PLSP-ID=1---------------| Label
    |       |     |                   R=1               | cleanup
    |--------PCRpt,CC-ID=X,PLSP-ID=1------------------->| CCI
    |       |     |              R=1                    |
    |       |<------PCInitiate,CC-ID=Y1,Y2,PLSP-ID=1----| Label
    |       |     |                              R=1    | cleanup
    |       |-------PCRpt,CC-ID=Y1,Y2,PLSP-ID=1-------->| CCI
    |       |     |                         R=1         |
    |       |     |<----PCInitiate,CC-ID=Z,PLSP-ID=1----| Label
    |       |     |                              R=1    | cleanup
    |       |     |-----PCRpt,CC-ID=Z,PLSP-ID=1-------->| CCI
    |       |     |                         R=1         |