Hello, this is my first post on OpenBSD, so do not riddle me, please...

I have one infrastructure with one tunnel IPSEC. This works ok, but I think I 
can duplicate the transfers. My topology is like this:

  * One ADSL 20Mb on Site A
  * Two ADSL 10Mb on Site B
  * Consists on one OpenBSD by site, attached the router directly

I need share Network A with Network B with ipsec like now, but 
balanced/failovered. I search solutions and found 3 methods, but I'm not sure 
which use and this seems a little complicated:

  * CARP (I haven't two server by site)
  * PF (with ipsec i'm lost)
  * ifstated (I dont know nothing of this)

I will send my topology graphically on attachment (it will read with system or 
fixed font).

Thanks very much and regards.
                                     #            20.0.0.0          
 ########                            #                ---             ######
 ##    ##                            #          10Mb |DSL|--------\   ##   ##
 ########                            #                ---         |   ######
 ##    ##                            #                /           |   ##   ##
 ##    ##       20Mb            ##########           /            |.2 ######
    --- .2      ---          .1 #        #----------/            ---
   |BSD|-------|DSL|------------#  INET  #                      |BSD|---
    ---         ---             #        #----------\            ---     \
     |                          ##########           \            |.2    |
     |         10.0.0.0              #                \           |     ---
    ---                              #                ---         |     NET
    NET                              #          10Mb |DSL|--------/     ---
    ---                              #                ---            101.0.0.0
 100.0.0.0                           #            21.0.0.0

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