Hi,hope all are good..kindly note that if you have multiple department defenatly you must have it so creat vlans on core switch according to your departments and two saperate vlans for Wifi users in which one vlan is for internal wireless users and o...

this is a problem of your system side there is no configuration issues, so to verify kindly plug another PCs or laptop on same port in same vlanthanks

hi,kindly provide conguration file o router and switch and as well as Ip address settings of both PCs