Achieving 10 Gigabit Connection Over a Switch with 100 Megabit Gateway

sfpswitch

I have limited knowledge of this and I'm still learning, so I hope someone can give me advice on this.

I have a 10GbE NAS, a 10GbE NIC in my PC and a switch with two 10GbE ports, which connect all together with fiber. Then there is also another 100Mbit cable attached which connects the switch to the router, which is also the standard gateway. This one also provides the internet connection for all connected devices.

I noticed that a direct connection to the NAS gives me speeds that 10GbE can handle, but when I put the switch in between (all standard VLAN, same subnet and standard gateway), the speeds to the NAS is limited to a max of 1GbE.

Is because the standard gateway is the central where all traffic comes together? How can I manage a peer to peer connection directly to the NAS via the switch, so the traffic goes through the 10GbE cable to the switch and from there through the 10GbE to the NAS?

Extra details:

IP NAS: 192.168.10.120
IP switch: 192.168.10.125
IP PC: 192.168.10.103
Standard gateway: 192.168.10.1
Subnet: 255.255.255.0
Switch: D-link 1510-52

Thank you

Best Answer

I don't think the default gateway has anything to do with your problem. Local traffic between two devices on the same subnet doesn't flow through the default gateway and in any case the speeds you are reporting for your local traffic are 10 times higher than the speed you report for the link to your default gateway.

A couple of possibilities spring to mind.

Firstly are you in the correct ports? from some searching it seems only two of the four fibre ports on that switch are 10G.

Secondly I have heard reports of some early switches which have 10G ports but which can't handle a full 10G for a single flow because of their internal forwarding design.

Related Topic