Slow connection with 1Gb than 100Mb NIC

[Quiltface]

I have 3 cisco express 500 switches. 2 24 port 10/100 switches and 1 12 port 10/100/1000 switches.

The 12 port is new, got it for the servers to sit on and get their 1Gbps speed, we ran out of room on the 2 24 port switches. There is only 5 servers on this switch, 5 ports are open and 2 are used for uplinking to the other switches.

Users have noticed a lot of bottle necking on their applications that talk to these servers. If I go to the server and switch it from Auto to 100Mbps/Full it is back to normal.

Why are the users experiencing delays when the servers are running at 1Gbps.

The only other troubleshooting I have tried was to set the switch to 1000 / Full and the server to auto negotiate 1000, that didnt help.

We have about 24 users, I have 12 users on 1 switch and 12 on the other.

Then printers on 1 of those switches and our older servers and networking equipment (spam filter, firewall, etc..) I split the users up to keep the uplinks from bottle necking.

We have 1Gb uplinks to the main switch, and all of the users are 100Mbps (since they are on the 10/100 switches)

 

[bilbus]

First off never set a switch to a manual speed, and a server to auto. Always set both sides the same. Both to 1000 full or both to auto.

Doing what you did will cause a duplex mismatch, and cause transmision errors.

are you sure the uplinks are connecting at 1000 full? Sounds like clasic duplex mismatch symptoms here.

 

[Quiltface]

Thats what I thought too, and I tried setting the switch to 1000 / Full duplex and the server to auto negotiate 1000 (1000 / Full is not an option here) and it didnt seem to help.

thank you for your response