I have multiple VLAN (VLAN1, VLAN10, VLAN20) at the office, and the pfSense DHCP server runs on VLAN10, it appears Dell x1000 series only allows VLAN1 as management VLAN, so as soon as I set the incoming packet as tagged with VLAN10 as mgmt VLAN, I lost the access to the switch, I cannot manage the switch UI/CLI, nor can I ping the ip that was assigned if I uses untagged.

Steps to recreate

1. on the parent switch, set the port connecting to X1000 as untagged VLAN10 
2. connect x1000, x1000 receives an IP from pfsense DHCP successfully 10.0.10.147, I can set up the x1000 to add VLAN1, VLAN10, VLAN20, then change the uplinking port to trunk to accept these VLANs
3. back to the parent switch, set the port connecting to X1000 as tagged, now I cannot ping 10.0.10.147 any more.

Is there anyway that I can set up the x1000 to use VLAN10 as mgmt VLAN?