Plex throttling on 2degrees? Or other routing issue?

Forums › 2degrees (including Slingshot, Orcon, Flip, Stuff Fibre, MyRepublic, 2talk and Vocus) › Plex throttling on 2degrees? Or other routing issue?

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#3279851 8-Sep-2024 10:14

2fst4u:

If it's a routing issue that's that's still a provider problem? Beyond my WAN port I'm not in control of anything.
I admire the troubleshooting tenacity to get my non technical friend to run iperf lol. I'll change that SFP when it arrives and see what happens first.

I was referring in relation to your connection. There could be upstream routing issues which would be a wider provider issue - if you are not going to attempt to troubleshoot it and provide supporting info then its going to be incredibly challenging to resolve. Need facts and the more info you can provide to 2degrees - the better placed they will be to resolve it.

The simple fact that its working over VPN implies your WAN connection is able to push those speeds. As I said - remove Plex from the equation and run some tests.

-- opinions expressed by me are solely my own. ie - personal

RunningMan

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#3279852 8-Sep-2024 10:16

2fst4u:[snip] From a vm on the proxmox host connected to my LAN bridge network I can get 900/120 speeds (not as fast as I actually hoped but good enough).

My emphasis. Respectfully, absolutely not good enough. As several others have repeatedly pointed out, you need to troubleshoot this fundemental issue first before looking at another application that won't work. You're only getting a quarter of the expected throughput on a speedtest. There's all manner of TCP config or driver issues which can lead to this, and until they are resolved, then troubleshooting the other issue will be far more difficult or impossible.

2fst4u: So help me. I am trying to validate my configuration by posting here.

And yet you've posted almost none of this configuration for people to help you check. People are trying to help you here. There's no point complaining about getting generic answers and suggestions when you've only provided generic information. If you want someone to help check your router config then post a sanitised version. Also, hardware details, NICs etc. (looking at you Realtek!).

freitasm

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#3279853 8-Sep-2024 10:16

Jiriteach:

As I said - remove Plex from the equation and run some tests.

It's more like "remove Plex, VM, and Proxmox" and run some tests or even use different hardware. And that includes the firewall.

To eliminate or confirm a routing issue, it must be as barebones as possible. If the test shows no issues, then reintroduce one bit at a time.

BlueOwl

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#3279857 8-Sep-2024 10:26

Actually from your symptoms it smells like a MTU discovery issue. This explains why the VPN works - VPNs always reduce the max packet size for tunnelling, and they use methods such as TCP MSS clamping to keep the packet size down.

As a first step you should check that your firewall (router, etc) is not blocking ICMP either out or in. Also check any firewalling or packet filters on the Plex host is not blocking ICMP.

It could even be caused by the TCP/UDP segment offloading between the Plex VM, hypervisor, and physical devices and drivers for the box. I've seen that one happen before and it's very difficult to trace down and diagnose.

Temporarily reducing the Plex host interface MTU down to 1400 might also be a useful test. But note that doing so might affect other hosts in the same LAN from talking to it properly.

Ruphus

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#3279858 8-Sep-2024 10:29

If you're in the Wellington area I have a couple of gigabit SFP modules you could borrow for testing if you'd like. Not 10Gb, but on your current WAN speeds, it won't be a problem.

I also have OPNsense running in a VM and have been for a couple of years now. It's currently running on Hyper-V with zero issues and I have plans to migrate it onto a proxmox cluster for high availability. I have a 10Gb network with plans of moving to hyperfibre once the new ONTs are available so it can fit into my structured cabling enclosure.

I'm running Plex over HTTPS with a custom URL with DNS in Cloudflare so unable to help with Plex Remote Access, but how does the routing work with Plex Remote Access? Is traffic directed to your public IP or is the traffic routed through Plex somehow?

nzkc

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#3279863 8-Sep-2024 10:42

2fst4u:
nzkc:

What does the "Remote Access" tab show? Does it say this or something else:

I really think you need to diagnose your 120Mb/s upload too. Though that should be plenty for streams if its consistent. It hints at a network configuration issue.

If my Plex server didn't have remote access successfully configured them all the previous things I've gone through wouldn't have worked. Other friends can stream fine and I can stream on data with a commercial VPN connection.

In other words, Plex is configured correctly. I think we've established this.

Was trying to see if you've set up things so it gets direct conneciton and not via Plex servers. That could explain the difference in performance for different providers and VPNs. But you seem pretty bloody adamant everything is fine.

2fst4u

54 posts

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#3279868 8-Sep-2024 11:11

In every situation described so far, the connection is "direct". It is never "relay" or "indirect". The screenshot you provided it on the server, not the client. A different provider will not make that screen show differently.

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michaelmurfy

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#3279871 8-Sep-2024 11:23

@2fst4u could you please answer my questions? https://www.geekzone.co.nz/forums.asp?forumid=81&topicid=316002&page_no=2#3279826

Michael Murphy | https://murfy.nz
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2fst4u

54 posts

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#3279872 8-Sep-2024 11:26

No not yet. One thing at a time. The model SFP+ I have appears to have problematic reviews at 1gbps speed so I'll change that first and report back.

Ruphus

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#3279934 8-Sep-2024 12:14

You could try going back to the pfSense appliance.

Delorean

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#3279938 8-Sep-2024 12:44

2fst4u: No not yet. One thing at a time. The model SFP+ I have appears to have problematic reviews at 1gbps speed so I'll change that first and report back.

Well, I am sorry to say if you are not prepared to listen to very experienced networking engineers (at no cost) and basically saying to them, you know better then good luck to solving the issue on your own.

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2fst4u

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#3279943 8-Sep-2024 13:01

Delorean:
2fst4u: No not yet. One thing at a time. The model SFP+ I have appears to have problematic reviews at 1gbps speed so I'll change that first and report back.

Well, I am sorry to say if you are not prepared to listen to very experienced networking engineers (at no cost) and basically saying to them, you know better then good luck to solving the issue on your own.

I said nothing of the sort, cool your jets. An experienced network engineer would know not to change more than one variable at a time.

michaelmurfy

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#3279945 8-Sep-2024 13:07

@2fst4u one variable at a time is fine. But you’re yet to answer some very simple questions that may help people help you. Please answer the following:

1) Your Proxmox server specs and setup. How it’s connected also. What type of network interfaces has it got (Realtek?) and also are you using IOMMU Passthrough to OPNSense or creating a virtual bridge?

2) Your Plex setup? LXC or VM?

3) Have you done an iperf3 test between your Plex server and your Firewall to confirm it’s not a Proxmox bridge issue?

it’s important to provide as much detail as possible. You created this thread seeking help and if you don’t want to be helped then we’ll just lock this thread and move on.

2fst4u

54 posts

Master Geek

#3279947 8-Sep-2024 13:14

You'll lock the thread without intention to simply wait for a result? That's not very scientific of you or helpful to anyone else who might run into the same problem.

Most of these questions have already been answered to an extent and quite frankly I consider them irrelevant.

1) Your Proxmox server specs and setup. How it’s connected also. What type of network interfaces has it got (Realtek?) and also are you using IOMMU Passthrough to OPNSense or creating a virtual bridge?

Minisforum MS-01. We've already established I've found an interface issue which I'm already investigating. All interfaces are bridges. With the specs on this device bridges will be completely sufficient. Note it was already stated the interfaces are bridges earlier

2) Your Plex setup? LXC or VM?
I already said it was a container in another subnet, not the same host. This segment of the configuration is unchanged.

3) Have you done an iperf3 test between your Plex server and your Firewall to confirm it’s not a Proxmox bridge issue?
I've confirmed between Plex and internal clients there's no issue by way of streaming internally with no issue. The Plex dash surges into the tens to hundreds of Mbps on streaming internally. The issue is out to the WAN.

Asteros

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Ultimate Geek

#3279952 8-Sep-2024 13:32

My two cents: if you are only getting 200 Mbps upload on a Gigabit Fibre connection, you could start troubleshooting there. 2degrees states an average 480 Mbps peak time upload.

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