Is there a way to configure Plex to stream through home network without affecting internet speeds?

I have multiple devices at home connected to my Home Network. What I would like to know, is there a way to configure Plex to stream through your network instead of going from your router out to World Wide Wonder and then come back in through the router to the device you streaming too? My kids play games online and when I stream movies from my computer to my TV it slows down their online gaming (High Ping). I figure Plex would be smart enough to say “Hey I dont need internet to play this file directly to the Tv or device” especially when its connected directly to my home network.

@chrism2029 said:
I have multiple devices at home connected to my Home Network. What I would like to know, is there a way to configure Plex to stream through your network instead of going from your router out to World Wide Wonder and then come back in through the router to the device you streaming too?

It shouldn’t be doing that.

My kids play games online and when I stream movies from my computer to my TV it slows down their online gaming (High Ping). I figure Plex would be smart enough to say “Hey I dont need internet to play this file directly to the Tv or device” especially when its connected directly to my home network.

It is.

Describe your setup and devices and post logs showing the issue.

Current guess is your router is just struggling with security or DNS rebinding requirements of Plex.

First thing you need to determine is:
Does Plex indeed stream the data over your internet connection?
This would be indicated in your Plex client. It shows the name of your server and then either ‘nearby’, ‘remote’, ‘cloud’, or ‘indirect’.

What appears for you there?
If it says ‘indirect’ or ‘remote’, you need to take a closer look at your home network.
Is there only one router? Or several?
Are there PowerLan adapters sowewhere on the network?
Does the router separate the ‘wired’ from the ‘wireless’ hosts in your network (sometimes called ‘guest network’)?
Is your Plex server connected wirelessly to the router? What about the other devices?

@OttoKerner said:
First thing you need to determine is:
Does Plex indeed stream the data over your internet connection?
This would be indicated in your Plex client. It shows the name of your server and then either ‘nearby’, ‘remote’, ‘cloud’, or ‘indirect’.

What appears for you there?
If it says ‘indirect’ or ‘remote’, you need to take a closer look at your home network.
Is there only one router? Or several?
Are there PowerLan adapters sowewhere on the network?
Does the router separate the ‘wired’ from the ‘wireless’ hosts in your network (sometimes called ‘guest network’)?
Is your Plex server connected wirelessly to the router? What about the other devices?

I was thinking along the same lines. There are several factors that not everyone understands. There is your home network and there is your link to the outside world. If you are playing content from a Plex Media Server on your home network to another device on your home network, the Internet is not a factor… you could have a crappy Internet connection yet if you have a good home network, you can stream in very high quality inside the house. Networks have finite bandwidth. If your home network is all Ethernet connections and you are using a network switch as opposed to a network hub, even 100 Mbps should work fine. In a switched network, all devices have a dedicated 100 Mbps connection up and down to the switch. Devices A and B connected with a switch can use all their bandwidth between each other while devices C and D are able to as well. This is kind of like a freeway interchange system, no need to come to a complete stop to switch from one road to another. A network hub is more like a multi-way stop light. If many roads all meet at the same stoplight, it may cause a huge slow down to get from point A to point B. When you throw in wireless or devices that use your power line to send network signals, you are congesting traffic by forcing many different types of traffic, intended for possibly numerous locations, to all use the same road, causing a bottleneck. Your Internet connection is just one of the possible paths for your information to travel upon, if it is coming in or out of your house.

Knowing all this, I have added Ethernet wiring all throughout my house. There are at minimum, two network jacks at each location I may possibly have a television in my house. All the networking comes back to two 24-port gigabit switches. I do have a WiFi access point, an 802.11ac MIMO WAP, but I use that only for devices that do not have an Ethernet port, like my iPads, iPhones, Amazon Dot, etc… as well as the occasional time I want to use my laptop and don’t want to pull out a network cable. My Internet happens to be gigabit both up and down, so for me, I seldom, if ever have bandwidth issues. This is nice because I use my Plex outside the home quite a bit, and so do a few family members I’ve granted access to.