Sophos APX causes network loop

Question

Hello everyone, 
 after restarting the two APX 120 that we are using, a network loop is caused. If I disconnect the AP&acute;s from the network, everything works fine again. I have replaced all cables and used different ports. They are directly connected to the switch via POE. 
 I don't know what to do here. The switch also reports loop counts for the specific ports 
 Can someone help? 
 Thanks a lot

PhilippRusch · Answer

My wild guess is that he maybe tried to setup a mesh, then abonded that and now has a messy config on those two APs, which causes the to go in a loop when both are cabled to the same network. 
 To clean things up, you should connect only one AP, let it boot und update itself the whole way through (this can take a quarter of an hour), then clear every config on the UTM for the APS and start from new. 
 After the first one works, disconnect that from the net and power. Now you make the same for the second AP, to see if that is ok. 
 If this is ok, too, you could start a new AP-config with two AP connected at the same time.

Sophos APX causes network loop

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