If you want to use the Mgmt vlan (VR-Mgmt) to access (manage) the switch, you have to apply an IP on the Mgmt vlan:
configure vlan mgmt ipaddress
However, the Mgmt vlan (VR-Mgmt) is non-routable. You cannot connect your laptop into another vlan (VR-Default for instance) and access the Mgmt vlan (VR-Mgmt). That means you have to connect your laptop directly to the Mgmt vlan.
Also you can manage the switch using HTTP/HTTPS (web interface) using the Mgmt vlan IP.
For HTTP:
enable web http
For HTTPS:
enable web https
Note: To use HTTPS you have to load the SSL/SSH module into the switch.
Please refers to this article 1266
How to enable web interface on an EXOS switch for information about how to load the SSL/SSH module and enable https.