ldp_struct.txt

Linux平台下

                                                    -----
                                            .------| Adj |
                        (think || links)   /        -----
              ----------               \  /           |  
             | In Label |-------.       1:N           |
              ----------        N:M     /             |
                  |               \    /             1:N-(think eth subnet)
                 1:N               \  /               |
                  |              ---------         --------         ------
             -----------   N:1  |         |       |        |  1:1  | Targ |
            | Out label |-------| Session |       | Entity |-------| Peer |
             -----------        |         |       |        |       |      |
                                 ---------         --------         ------
                                     |                |
                                    N:M              1:1
                                     |                | 
                                  ------            -----
                                 | Addr |          | If  |
                                  ------            -----

                                                  ----
                                                 |Addr|
                                                  ----
                                                   |
                                                   |1:N
                                                   |
                          -----         1:N       ----   1:N   ----
                         |     |-----------------| NH |-------| If |
               .---------| Fec |---------.        ----         ----
               |         |     |         |         |
               |          -----          |         |1:N
               |    Downstream FS list   |         |
               |  ------         ------  |     ---------
               '-|  FS  |-------|  FS  |-'    |Out label|
                  ------\        ------        ---------
                    |    `-------------------.
                    |                         \---------
    .--------------------------------.        | session |
    |                                |         ---------
    |  ------     ------     ------  |
    `-| Attr |---| Attr |---| Attr |-'
       ------     ------     ------

This picture is a more accurate view of the FEC <-> Attr relationship.
Each FEC has multiple FS.  Each FS represents one session that has learned
info about this FEC.  More then one piece of info can be learned by a session
for a particular FEC, so each FS can have a list of Attr, which is all of the
info learned about this FEC by this session.  Take note that each FEC entry
has a list of FS for upstream and downstream sessions.