Printing slow after IP schema change

over weekend switched class c network class b. have 150 hosts. since then, printing our print server has become slow. else working ok. if add network printer directly workstation, prints fine. if send print job directly server printer installed on it, works fine. if print job has go through share print, it's slow.

the issue appears isolated our domain controller. if add printer being hosted machine, print job goes through fine.

 

this became apparent right after our ip schema change.

 

any ideas?

 

we ruled out network congestion or issues relating broadcast.

we running out of ip addresses on our class c network , switched class b. researched , saw articles againsts due broadcast traffic. said each subnet shouldn't larger 500 hosts. have 150 hosts on our network , seeing slow down.

 

could still related broadcast traffic though have 150 hosts? turned on wireshark (packet sniffer) , saw loads of broadcast traffic being sent around. i'm not sure how gauge whether or not broadcast traffic i'm observing high enough cause kind of slow down.

we using hp procurve 2810-48g switches.

any ideas?

Windows Server  >  Print/Fax