The whole thing is completely crazy!
To start with: Yes we have our own domain, not only on OU. But it is a subdomain "linneskolan.uppsala.se" where DNS is handled by servers on skolnet.uppsala.se. It works.
BUT!
My libranet-computer, named li-bib1 gets via DHCP 10.0.5.5
Tracert from domainserver says 10.0.5.5 is li-elev
Traceroute on libranet says 10.0.5.5 is li-b40-6
Ping from domainserver to li-elev -> unreachable (yes, it hasn't been on since yesterday)
New tracert from domainserver says 10.0.5.5 is li-bok
ping li-bok gives correct adress 10.0.1.145
The same thing happens on both domains??? What the h** is going on???
And no computer has any trouble at all connecting to internet...