On Wed, Jan 11, 2012 at 7:08 PM, Alexandru Juncu <alex.juncu@xxxxxxxxxx> wrote: > On Wed, Jan 11, 2012 at 12:21 PM, Manavendra Nath Manav > <mnm.kernel@xxxxxxxxx> wrote: >> Hi All, >> >> I have a 100Mbps LAN with 10 connected terminals through a Switch. >> Now, I understand 100Mbps is the max speed at which a terminal can >> send/receive data. If every terminal sends data at this speed, then >> does this speed distributes/divides according to load, or is it >> dedicated for each terminal. How to measure it? >> >> -- >> Manavendra Nath Manav > > It's rather a generic question... let me try to begin to answer it. > First of all, the speed of the link is 100mbps wire speed. There is a > lot of overhead caused by different protocols (I redirect you to learn > about the OSI or TCP/IP stacks and about encapsulations). So the speed > is way lower than 100 when doing anything over the network. > > Now, the question about if the speed is shared is hard to answer. The > straight forward answer is no. Traffic would be shared if the network > would be connected via a hub ( I doubt hubs are actually used in > modern networks). Switches are 'smart' so they don't push traffic in > parts of the network where is not needed, so, theoretically, the > bandwidth is not share. > > However, most of the traffic we have in a network is not inside our > Local Area Network, but with the Internet and all that traffic passes > through the gateway. So the gateway would be the bottleneck and the > traffic is 'distributed' among the hosts in the network. > > This is a very brief answer to what you said... maybe if you could > provide some further details on what exactly you want to do, you will > receive a better answer. > > > -- > Alexandru Juncu > > ROSEdu > http://rosedu.org Hi Alexandru, Thanks for the detailed answer. In my 100Mbps LAN setup, I have several clients/terminals connected to a server. The problem is that the server is connected to the LAN via a GPRS module whose bandwidth is very less (128kbps). So, different clients are parallely sending data to server but most are getting timed-out because of bandwidth constraints. My question is how I can verify that packets are being dropped/timed-out because of bandwidth at the GPRS interface? Is there any tool to do this? -- Manavendra Nath Manav _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
