Internet connection problem : connecting switch to router.

[Huerz22]

I am using HP 1920 8-Port Gigabit Switch in my office. We are using only 5 out of the 8 ports to connect with the 3 systems, printer and server. On port is connected to the router.  The problem is, I am facing problems with accessing the internet on the connected computers. The connection drops frequently and I have to unplug and replug the ethernet cable from the router. I checked with the ISP and after inspection, they told that there is nothing wrong.  We use  120/10Mbps high-speed cable internet. I would like to know if there is anything I can do you solve this problem, or should I replace the switch? 

These are connected to the switch. you can see their specs.

switch:  HP 1920 8 Port Gigabit Switch 

router:  Linksys se6900 

modem :  Thompson TC 4300 (https://www.acanac.com/hardware/thomson-tc4300-c/?package=cable )

System : 3 DELL Inspiron 22 3000 

server : Dell PowerEdge http://www.ebay.ca/itm/like/131668662094?lpid=116&chn=ps

Printer : Canon MG3620 Inkjet

Please help me identify the fault in the network. Ask if you need more details.

Thanks in advance.

[parnassus]

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Huerz22 wrote: The problem is, I am facing problems with accessing the internet on the connected computers. The connection drops frequently and I have to unplug and replug the ethernet cable from the router.

First thing first: you must decide which debugging strategy to follow, top (OS)/down (Physical) or down (Physical)/top (OS) when examining your little network.

Are your PCs (and Server) be able to communicate each others (ping/file transfer and so on...) and so the issue is "only" on the Internet facing side (Default Gateway/Router) or what?

That's to understand where to start diagnosing...

What happens if you test you Internet Connection behind the Linksys Router (LAN side) by connecting just a single PC (a notebook, as example...that's because it will be easy to test) and disconnecting the HPE OfficeConnect 1920-8G Switch (so seizing all the hosts connected to it)? Do you surf the Internet? Which IP Addressing parameters on the host lets it to work that way? and so on...

Supposing that your Linksys EA6900 Router acts - at least in a quite usual and very basic network configuration - as the Default Gateway for all of your hosts (Three PCs, the Server and a Printer)...and it does so by providing NAT (Network Address Translation) between its WAN side (single Yellow Gigabit Ethernet port - "Internet" labelled - connected to the Thompson Modem) and its LAN side (blue Gigabit Ethernet - "Ethernet" labelled - switched ports)...based on the debugging strategy cited above...you should start to inspect layer by layer (e.g. physical layer: physical links, Cat.5E/6 UTP or STP Certified patch cords/cables used, is there a loop somewhere?...and so on...up to the Operating System configuration layer: IP Addressing on each host, DNS settings, DHCP settings, who acts as DHCP Server? and so on...)...it should be not too difficult to understand why you had networking issues and who (or what) is the culprit.

I assume that Software/Firmware and Device Drivers of all involved Hardware units is up-to-date (or, at least, you know that Software/Firmware and Device Drivers are working reasonably well without being so up-to-date or being unmaintained):

• See here for Linksys EA6900 (note the Release Notes here).
• See here for HPE OfficeConnect 1920-8G (JG920A).
• Review the LAN/WAN configuration of the Linksys EA6900 too.

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