https://community.sophos.com/sophos-xg-firewall/f/discussions/136420/high-availability---dedicated-link-loss-no-split-brainHi, im just having a quick question. Our two XG450 are splitted between two datacenters. The dedicated HA Link is connected via Fibre. All other links are connected to the switches inside the datacenter. Sadly one of the SFP died last week, but theen-USTelligent Community 12https://community.sophos.com/thread/505804?ContentTypeID=1Thu, 15 Sep 2022 15:32:48 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:041f106c-697a-43b3-a5e1-5390578725adLuCar Toni<p>SFOS does have a mechanism to prevent this situation. Essentially before the AUX Appliance takes over, it will check, if the Primary still is activate and accept / send traffic. In that case, the Aux will not take over, preventing a Primary-Primary Situation.&nbsp;</p><div style="clear:both;"></div>https://community.sophos.com/thread/505803?ContentTypeID=1Thu, 15 Sep 2022 15:15:41 GMT4be5eb7d-caa4-4ff5-8e60-8f9463545a35:47940ec3-8c9a-4b7f-9af9-495ceb1f0e59dirkkotte<p>As all used interfaces have L2 connectivity, it is possible XG master see the &quot;other side&quot;. (and the peer see the master)</p> <p>That would be clever ... but I haven&#39;t heard anything about it yet.</p> <p>But i think the sync isn&#39;t working.&nbsp;</p> <p>How about HA-status ?</p><div style="clear:both;"></div>