Xencenter mangement and trunk port setup

I appreciate you taking time to answer my questions. I have one more and this should be the last. The computer that xencenter is on is in vlan 30 and xcp-ng management is in Vlan 10. Before i started messing around with it it was in vlan 30 with a dhcp reserved ip and it worked fine. When i swicthed it to vlan 10 it worked fine but when i tried to make the vlan networks from the former vlan 30 port after making it a trunk port xen center all of sudden would stay connected for 1 min then disconnect. It would automatically reconnect in 120 seconds but i could manually reconnect but it would still disconnect after a minute. My question is do you have an idea what this might be and how to correct it.

Thanks in advance.