LAGG + CARP VIP results in both machines in 'backup' state
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 I have 2x PFSense boxes, each with an OPT1 LAGG interface comprised of 3 nics When configuring a CARP VIP both PFSense machines fall to "backup" . If I chose an interface that is just a single physical interface (no LAGG) everything works fine. Does PFSENSE support what I'm trying to do? If so what am I doing wrong? 
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 That works fine, but it may be your switch isn't doing something right. If both are backup they must both be seeing a bunch of carp advertisements, so perhaps traffic is looping among the lagg interfaces. I'd focus on the switches and the lagg modes involved. 
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 The CARP has its own dedicated interface - are you saying there are CARP announcements on the VIP interface (OPT) as well? Really bad diagram below: PFSENSE 1 PFSENSE 2 
 lan interface <- - carp - -> lan interface(OPT1) LAGG0 (OPT1) LAGG0 
 \ /
 \ /
 –CARP VIP--
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 The sync interface is its own interface, that is not a "carp" interface. Nothing for CARP happens on the sync interface; That is for pfsync (state sync) and xmlrpc (config sync). CARP heartbeats are sent on each interface that has a CARP VIP. 
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 Got it - thanks for clarifying. Will check out the switches 
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 The sync interface is its own interface, that is not a "carp" interface. Nothing for CARP happens on the sync interface; That is for pfsync (state sync) and xmlrpc (config sync). CARP heartbeats are sent on each interface that has a CARP VIP. Just checking back in - Using a Juniper (ex2200-48t-4g) Switch we created a LACP group in "active" mode and set the PFSENSE LAGG interface to type "LACP" and the CARP is working perfectly. Thanks for the quick response! ;D 
