[ovirt-users] prod network glitch after reboot lab server

Hi, I have two ovirt environments on the same network. 2 switches (10G switch for storage and 1G switch for data / management) 1) Prod environment: 3 oVirt 4.4.6 nodes (1 port 10G per node for storage gluster and 1 port 1G for data / management) 2) Lab environment 2 oVirt nodes 4.4.6 (1 Port 10G per node for storage gluster and 1 port 1G for data / management) The storage is on the same vlan and subnet for both environments. When I restart one of my lab servers, I have communication cuts/glitch on my production ovirt clusters. I even had server reboots. Do you know why ? Here somes log : VDSM ovnode1.telecom.lan command SpmStatusVDS failed: Connection timeout for host 'ovnode1.telecom.lan', last response arrived 42479 ms ago. Host ovnode1.telecom.lan is not responding. It will stay in Connecting state for a grace period of 88 seconds and after that an attempt to fence the host will be issued. Invalid status on Data Center Default. Setting Data Center status to Non Responsive (On host ovnode1.telecom.lan, Error: Network error during communication with the Host.). Host ovnode1.telecom.lan cannot access the Storage Domain(s) datassd attached to the Data Center Default. Setting Host state to Non-Operational.