<#part sign=pgpmime>

Actually, in my haste, I skipped a possible step:

step1, H1 tells A that H2 is closer:

  A                                                        B
   \                                                      /
    \.....................                               /
     \                    \                             /
      +----+    trunk1    +------+    trunk2     +-----+
      | H1 |==============|  H2  |===============|  H3 |
      +----+              +------+               +-----+
     /                            \
    /                              \
   C                                D


step2, H2 tells A where H3 is:

  A                                                        B
   \............................................          /
    \.....................                      \        /
     \                    \                      \      /
      +----+    trunk1    +------+    trunk2     +-----+
      | H1 |==============|  H2  |===============|  H3 |
      +----+              +------+               +-----+
     /                            \
    /                              \
   C                                D

step3, H3 tells A where B is:

  A........................................................B
   \............................................          /
    \.....................                      \        /
     \                    \                      \      /
      +----+    trunk1    +------+    trunk2     +-----+
      | H1 |==============|  H2  |===============|  H3 |
      +----+              +------+               +-----+
     /                            \
    /                              \
   C                                D


-- 
]       He who is tired of Weird Al is tired of life!           |  firewalls  [
]   Michael Richardson, Sandelman Software Works, Ottawa, ON    |net architect[
] [email protected] http://www.sandelman.ottawa.on.ca/ |device driver[
   Kyoto Plus: watch the video <http://www.youtube.com/watch?v=kzx1ycLXQSE>
                       then sign the petition. 
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