I had difficulties with our network speed, we still had 100MBit switches so we made a change and replaced our 3 switches with some nice new ones (1 central 16 port going to 2 switches with 24 ports). I have decided to buy the HP 1920-16G and HP 1920-24G. Right now we plugged the switches in and things worked out of the box. We have 2 servers, one being the Domain Controller (Name: Alpha, IP: 192.168.100.10) and the SQL Server (Name: Delta, IP: 192.168.100.11).
Even though the computers are reached and my Domain Controller gives the users the DHCP lease the network is not recognized as a domain network anymore.
In Network and sharing this used to be displayed (Domain Controller still has it):
Now it is some unidentified network:
The users can log in but they can not automatically log onto network shares. Also authentication in the SQL (Windows authentication) does not work anymore and/or users can not change their user passwords by hitting ctrl+alt+del and select "change password".
This all makes me believe that either something in the mananaged switches is limiting a protocol of the domain controller or that during my reboot of the domain controller (changed things in the patch panel and had to disconnect power of server) some services where not started?
I am quite stranded here having 20 people unable to work properly right now, any Ideas?