i have a peer to peer network with 15 computers connected through a switch. i want to connect an internet router to the switch, so all on network can have access to the internet.
the set up is, dsl to modem to router to switch and all computers to switch.
is this possible?
if so, how?

Yup. Just like that.

Just make sure you turn off DHCP in the modem as your router will take over that chore.

Larry

"Have no fear of perfection -- you'll never reach it."

Salvadore Dali

you most likely don't have access to the modem nor would you want to disable dhcp on the modem because your routers wan interface wouldn't get a ip address.

With that said yes its possible and happens all the time. Trick is if the switch doesn't have a "uplink" port you need to use a crossover cable between the switch and the routers lan port(s).

you would also want to make sure the routers dhcp scope was large enough to support all the pcs you connect.

Give a person a fish you feed them for a day.
Ask a person to internet search and they learn a skill for a lifetime.

Are you sure wanderer? It seems to me you only need a crossover cable when connecting like devices. ie: router to router, switch to switch.

I know at work the Cisco 2600 router sitting on my desk is plugged into a Cisco 2900, a 2950, a 3500 and a Nortel Baystack 5510 switches and those are all straight through cables. At home here I have my Dlink DI-604 router plugged into a Cisco 2900 switch with a straight through as well.

Forgot to mention, in all the switches I mentioned, I haven't configured an uplink port. At present the 2900 at home is just setup as a straight switch with only the default VLAN configured. The ones at work all have different config's but again, I'm not configuring a specific port as an uplink.

Yep I am sure. Reason is you ARE configuring switch to switch. Sure you call it a router but the lan side is a switch. So you are connecting like devices which in this case is in the case of the poster is switch to hub.

In your case, one or more devices may support mdix which is autosense autocompensate for xover or patch to what it needs to be. This is a feature I haven't seen on any of the soho routers [dlink/netgear/belkin/linksys] I have worked on.

Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

correction: switch to hub should read switch to switch. AND I am assuming soho router not a router like Cisco 837 or similiar which does have mdix so it doesn't matter what cable you use [xover/straight].

see here
http://www.cisco.com/en/US/products/hw/routers/ps380/products_installation_guide_chapter09186a008010e5ad.html

Give a person a fish, they eat for a day. Suggest they internet search and they learn a skill for a lifetime.

Hi,

You don't actually need a crossover cable because you can plug the router directly into one of the switch ports just like any other computer. Use only one DHCP server (whichever one gets the WAN link) and turn the other one off. I know this config works as that is precisely what I have here. All computers on your local LAN go through the switch to the router in order to get IP config info via the DHCP server, and leave all local LAN traffic at the switch level, which is where you want it. It works very well, and is the best performance you can get both at the local LAN level (dedicated switch), and shared Internet connection (dedicated router).

DD.