Hello All. I am implementing a gigabit network and have a question on MTU settings. First does gig network cards auto adjust their MTU from 1500 to 9000 when negotiating a speed of 1 Gbps and if so how does this work when sending data from a gig port to a 100 fa port? I assume the only way to see a larger bandwidth is to adjust the payload size of the ethernet frame or maybe the gig cards have faster processors that speed up the transfer. Anyways I am just trying to figure out if I should see a significant performance increase when connected vi gig ethernet or is the frame size still a limiting factor?
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I understand that I have a bigger pipe to travel through and if I have simultaneous frames occuring that exceeds the capacity of 100 Mbps pipe I should notice a difference but for example what if it is just a basic file transfer between 2 clients that have no other connections occuring? I do understand that there is other traffic on this interfaces happening in the background such as ARP's, DNS, and other network traffic that is just part of the network. I am just trying to justify the reasons for going gig to the client (not the server because I think I understand that). If I limit the MTU's to 1500 then how would a client to client transfer be any faster than on a 100 Mbps network?