# Plex Playback Issue with High-Speed Switches

**URL:** <https://forums.plex.tv/t/plex-playback-issue-with-high-speed-switches/930463>\
**Category:** Plex Players\
**Tags:** server-docker, networking, player-windows\
**Created:** [September 6, 2025, 6:51am UTC](https://forums.plex.tv/t/plex-playback-issue-with-high-speed-switches/930463 "2025-09-06T06:51:07Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Thrawn](https://avatars.discourse-cdn.com/v4/letter/t/94ad74/32.png) [@Thrawn](https://forums.plex.tv/u/Thrawn)\
**Post date:** [September 6, 2025, 6:51am UTC](https://forums.plex.tv/t/plex-playback-issue-with-high-speed-switches/930463/1 "2025-09-06T06:51:07Z")

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Server Version#:1.42.1.10060  
Player Version#: 10.30.4.4092  
\<If providing [server logs](https://support.plex.tv/articles/200250417-plex-media-server-log-files/) please do NOT turn on verbose logging, only [debug logging](https://support.plex.tv/articles/201643703-reporting-issues-with-plex-media-server/#toc-1) should be enabled\>

I’ve been helping a friend troubleshoot a really strange Plex networking issue and would like your input.

**Hardware Setup**

- Plex server: Asus NUC running Plex Media Server (latest version, in Docker)

- Storage: Synology NAS (all media stored here) with Synology E10M20-T1 10Gb NIC

- Switches:

- 
- Router: Nokia Beacon G6 (ISP provided – I suspect this might be the cause)

- Clients:

- 

**The Problem**

When using the high-speed switches (10GbE/2.5GbE), the Plex app on both the Shield and the PC struggles:

- Thumbnails take ages to load or don’t load at all.

- Movies and shows endlessly buffer when trying to play.

- The Plex web app on the PC works fine, but the installed Plex app behaves like the Shield (slow, failing to play).

However, external streaming (remote access) works perfectly – even with direct play enabled.

**What Works**

- Scenario 1: Router → Shield & PC (direct) + NAS & NUC via switches → Works fine

- Scenario 2: Router → cheap 1GbE switch → Shield & PC → Works fine

- In both cases above, streaming locally and remotely is normal.

**What Doesn’t Work**

- Scenario 3: Shield (2.5GbE port on switch) + PC (10GbE port on switch) with router connected → Plex apps fail as described.

**What We’ve Tried**

- Tested with two different switches (QNAP and TRENDnet) → same issue.

- Reinstalled Plex app on PC and Shield → no change.

- Reset the Shield → no change.

- Tested with my own Shield on his network → same issue.

- At my home network (also 10GbE/2.5GbE) → works perfectly.

**Suspicions**

I strongly suspect the ISP’s Nokia Beacon G6 router may be causing this, but I can’t pinpoint why.

**Question**

Has anyone experienced something similar or have an idea what could be causing this?

Thanks in advance,

/Thrawn

P.S.

I forgot to say, everything else we can think of works as expected on the shield and PC with the trouble setup.

Filetransfers

Speedtests

Youtube

etc.

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**Author:** ![system](https://global.discourse-cdn.com/plex/original/3X/2/a/2acb9765406f63293d357b4ec509ec39aa28f2ad.png) [@system](https://forums.plex.tv/u/system)\
**Post date:** [December 5, 2025, 6:51am UTC](https://forums.plex.tv/t/plex-playback-issue-with-high-speed-switches/930463/2 "2025-12-05T06:51:39Z")

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