![]() ![]() You can consult your hardware manufacturers about firmware upgrades. Make sure you perform firmware upgrades on your router and devices and install the latest software for your wireless and LAN adapters. 5GHz can provide faster speed, although its range is shorter than 2.4GHz. Most current routers offer 2.4 and 5GHz networks. Other tips to help bump up your connectivityĬonnect to the 5GHz wireless band. ![]() Also, you need to use CAT5e or CAT6 ethernet cable to leverage the higher speed. The ports on the router also must support Gbps connectivity. The device you are connecting may not have a LAN adapter that supports a Gbps connection. If your internet service agreement provides for Gigabit speed, keep in mind there are many factors that can still slow down the wired connection. In this test scenario, there isn't a significant difference between wireless and wired speed. The speed isn't a full Gbps, because the level of internet service tested only supports up to 400 Mbps. this uses TCP.A slight bump at 403 Mbps down and 23 Mbps up. This is running iperf without the -u option, i.e. Even though I have to say that on our system the busiest core is 80% (83%) idle on the receiver (sender) side while the other 7 seem to be 100% idle (checked with mpstat). You might want to check the CPU load on the server and especially on the client side and see whether this is close to 100%. The network cards (lspci output) are: 82571EB Gigabit Ethernet Controller That should give you an idea of what performance is in principle possible. Not a direct answer to your question but recently we got the following result with iperf between two Linux boxes (8 core, 2.66 GHz each): -Ĭlient connecting to 192.168.74.15, TCP port 5001 If your network speed previously worked on 1GB transfer rates, but suddenly only provides 100MB it could point to your hardware. That's part of the reason they cost so much more. ![]() I think laptops are generally fairly cheaply built these days so if you don't see much above that then this could be the other bottleneck.Īlso, consumer grade switches can often only cope switching 1GB between any two ports whereas high end managed switches can switch at wire speed on all ports simultaneously. Networks that are on PCI express seem to operate better. On of the other bottlenecks is actually how quick your CPU can transfer data from the memory to the network card. So it's memory to memory or really testing the network. iperf doesn't use the harddrive unless you tell it to. To give you an idea, you should get I would think 650Mbit/s and above. Make sure you change your laptop & desktop back to DHCP when you've completed the experiment. That way, they will bypass the router to talk to each other. Plug your laptop and desktop into the switch. If you do find this is the problem then if I were you I'd either upgrade the router (which is probably fine for internet use) or go and buy yourself a GigE switch and cascade that onto the router switch. Many of these routers are terrible performers. Some of them have switches on the back, others can actually route between ports. If you see a marked increase then your router is the culprit. That should work as most modern network cards can auto-sense transmit/receive wires unlike the old days when you used to have to build a crossover cable. Run iperf between them and report the result back here. This should allow the laptop to talk directly to the desktop. Set your Laptop and desktop to use a static IP address like 192.168.1.10 (laptop), 192.168.1.11 (desktop). Plug the laptop directly into the desktop. I'd say thats most likely your bottleneck. That way you (at least) can pretty easily eliminate or identify the router (and/or existing wiring) as a bottleneck.ĭid you say you're using a router? is that an off the shelf consumer grade router (not switch)? If I were you my next test would be to get myself a 'just long enough' CAT6 crossover patch cable and wire the notebook directly to the PC (you may be able to get away with a straight-through cable, as many NIC's support auto-crossover these days). Therefore speed will be affected by the CPU doing other things (like getting the data from the HDDs to the networking sub-system for example).Īlso, depending on what the "router" is, it may be trying to process the data as it passes from LAN port to LAN port, so its processing speeds may also be affecting the data transfer speeds, regardless of how fast its 'ports' are. 1 Gbit/s is the theorectical maximum of this connection.Įxpect a hit in performance from your on-board NICs, as they will most likely be (based on device descriptions "Laptop" and "Desktop") host-based adapters that rely on the CPU to process the network traffic. ![]()
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