@ermal:
Your ipalias is the same as you carp vip ip?! Do you expect this to work?
Sorry, there was a typo on the Alias, corrected now.
BTW: I was unable to retrieve the redmine ticket #, so I couldnt update it there. Apologies!
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I just tried out another possible scenario:
Set up the pfsync AND the /27 subnet on OPT1.
Loosing the (my!!) preference of a dedicated pfsync interface, but this seems to work…