Constantly have to re-setup network, when host is shutdown. Help?

[GooseTickler]

i have an internet connection which is split between 3 computers. it is set up like this:

modem to computer A, then Computer A to router, then router to computers B and C.

-----B(client)
---Modem----A(host)----Router
-----C(client)

the problem is that whenever computer A is shutdown and then switched on again, (regardless of wether either/both B and C are on or off) the connection to B and C is no longer there and in that case i have to re-setup the entire network (on the computer, not physicaly)

i want to be able to have B and C connect immediately as soon as A is back on, without having to setup the network again.

can you help, please?

[Zac]

A better setup would be modem to router -- router to all pcs this would eliminate your problem and mean that all pcs can access the internet and will be behind the router (at the moment comp a isn't using any of the benefits of using a router, therefore your network is a lot more vulnerable)