doc/ldp_struct.txt

   1
   2                                                     -----
   3                                             .------| Adj |
   4                         (think || links)   /        -----
   5               ----------               \  /           |
   6              | In Label |-------.       1:N           |
   7               ----------        N:M     /             |
   8                   |               \    /             1:N-(think eth subnet)
   9                  1:N               \  /               |
  10                   |              ---------         --------         ------
  11              -----------   N:1  |         |       |        |  1:1  | Targ |
  12             | Out label |-------| Session |       | Entity |-------| Peer |
  13              -----------        |         |       |        |       |      |
  14                                  ---------         --------         ------
  15                                      |                |
  16                                     N:M              1:1
  17                                      |                |
  18                                   ------            -----
  19                                  | Addr |          | If  |
  20                                   ------            -----
  21
  22                                                   ----
  23                                                  |Addr|
  24                                                   ----
  25                                                    |
  26                                                    |1:N
  27                                                    |
  28                           -----         1:N       ----   1:N   ----
  29                          |     |-----------------| NH |-------| If |
  30                .---------| Fec |---------.        ----         ----
  31                |         |     |         |         |
  32                |          -----          |         |1:N
  33                |    Downstream FS list   |         |
  34                |  ------         ------  |     ---------
  35                '-|  FS  |-------|  FS  |-'    |Out label|
  36                   ------\        ------        ---------
  37                     |    `-------------------.
  38                     |                         \---------
  39     .--------------------------------.        | session |
  40     |                                |         ---------
  41     |  ------     ------     ------  |
  42     `-| Attr |---| Attr |---| Attr |-'
  43        ------     ------     ------
  44
  45 This picture is a more accurate view of the FEC <-> Attr relationship.
  46 Each FEC has multiple FS.  Each FS represents one session that has learned
  47 info about this FEC.  More then one piece of info can be learned by a session
  48 for a particular FEC, so each FS can have a list of Attr, which is all of the
  49 info learned about this FEC by this session.  Take note that each FEC entry
  50 has a list of FS for upstream and downstream sessions.