Am I using the right switch (SG350X-48-K9) ?

[FHausH]

I am representing a school with 4 computer rooms each with 20 students + 1 teacher + 1 printer (Windows 7 and Win-Domain).

So 88 devices are connected to 2 stacked Cisco SG350X-48-K9 (48x RJ-45, 2x RJ-45/SFP+, 2x SFP+) + Windows-Server + Internet.

We have a software for the teacher that can monitor each student, distribute files etc.

Each computer is  connected via a CAT7 cable.

Our problem:

When all 4 rooms are in use after a while the switch ist not accepting input any more, server connections break down and we need to restart EVERYTHING - server + switches + student computers.

This may work the rest of the day, but we may have another crash the same day.

Big question:

Did we purchase the wrong switch?

The 2 switches are connected via 2 CAT7 cables and are on the latest firmware release.

and

What can we do to find out what exacly goes wrong.

Any help highly welcome!

[viningele]

Here’s another link.

https://www.cisco.com/c/en/us/support/docs/smb/switches/cisco-350x-series-stackable-managed-switches/smb5408-configure-stack-settings-on-an-sg350x-switch.html

[viningele]

So how do you create a stack with redundancy with only two switches?  I don't know why a ring topology would care if there was a switch in the middle but.....   So what would the proper stack setup be for two switches with redundancy?  

[mipopov · Accepted solution]

Hello Viningele,

Why you set on the second unit all the gigabit ports in speed 100?

Set manually to 100Mbits on the end devices connected to these ports or make the ports on auto negotiation (command: no speed)

Happy new year

Cheers, 

Mike

[FHausH]

I have reset everything to auto negotiation.

Need to wait for next week.

Thanks