Will 100mbps modem/router limit Gigabit switch connections?

Hi all,

Just wondering if anyone could help with a small concern I'm having regarding an intended network setup?

Basically I've just had ADSL activated and due to a somewhat noisy line (even at the BT master socket using an ADSL Nation XTE-2005 faceplate) I would prefer to have the ADSL modem/router (a Sky supplied Netgear DG834GT) plugged in to this rather than running it off an extension.

My 2 primary desktop PCs (labelled PC #2 & PC #3 - both with dual onboard gigabit LAN ports) are on the 1st & 2nd floor but due to the slightly complex layout of rooms in the house I'd prefer to run only a single cable upstairs.

I'm also intent on avoiding using wireless (been using this for laptops for many years and have never been 100% satisfied) and powerline networking for these machines (old house, wiring not ideal) and so have decided upon the below layout as being easy enough to implement.

My question then concerns whether the computer-computer connection between PC #2 & PC #3 will be at the gigabit speed, even though the router is limited to 100Mbps?

Thanks for the response - I've heard the same on other forums so I'll consider the matter resolved.

What's happening is since you're NAS is getting it's IP from the routers DHCP client, it's also supplying the NAS with a default gateway, being the internal IP of the router.

So, when the NAS wants to communicate with someone on the same LAN, it sends it to the router, and the router forwards the data to its next destination...thus limiting it to 100Mb/s.

Of course, this depends on whether or not im picturing your topology right. Maybe a picture/diagram would help.