Toshiba Vista Satellite laptop doesn't like to share switch
I have an old Linksys switch, a EZXS55W 5 port. but after several hours my Toshiba laptop Satellite (Vista) looses its network connection, if there is something else sharing this switch. Also happens if I use an old D-link router set up as a switch. But a more modern Linksys BESR41 router, set up as a switch, this problem doesn't happen. These switches/routers connect to a Linksys LV016 router, which is set to do DHCP, assigning IP addresses.
Aside from the obvious "forget using this antique junk (the Linksys switch and the Dlink router)", any suggestions on how to make the laptop play nice? IE, not lose its connection to the network.