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Slow Transfer Speeds on 2.5 Gbe

Featured Replies

Hey All,

 

I 'think' i'm getting slow transfer speeds from my Desktop to UnRAID (NvME Cache) - approx 50 - 60 Mbps.

 

UnRAID is connected to router via 2.5 Gbe ports and shows as 2500 Mbps, full duplex, mtu 1500 in Unraid.

 

Ran iperf, and Bandwidth only showing between 168 to 181 Mbits/sec.

 

image.png.e0ee10e0d6529a585705d284a2027aba.png

 

How do I improve this?

 

 

alfred-diagnostics-20231123-1244.zip

Solved by siron1992

  • Community Expert

Realtek 2.5Gbe nics have been problematic for many Unraid users.  In fact, I ditched mine for an Intel nic after hours of troubleshooting the same speed issues you are seeing.

 

It looks as you may have a RTL8125B based nic.  I would try installing the RTL8125(B) PCI Drivers plugin available in CA.  It may help. (I would have tried this myself before swapping in the Intel, but the plugin came available after I swapped).

  • Author
7 minutes ago, ConnerVT said:

Realtek 2.5Gbe nics have been problematic for many Unraid users.  In fact, I ditched mine for an Intel nic after hours of troubleshooting the same speed issues you are seeing.

 

It looks as you may have a RTL8125B based nic.  I would try installing the RTL8125(B) PCI Drivers plugin available in CA.  It may help. (I would have tried this myself before swapping in the Intel, but the plugin came available after I swapped).


No success unfortunatly :(

image.png.da2b22770bc6d4ded167749921c08124.png

  • Author

Just done a both ways ipref and still the same with the Plugin and a New Cat5e Cable - 4 pairs.

image.thumb.png.1b8bc544fa5a1be7b111816f8dfe0627.png

  • Community Expert

You have confidence that the system you are using to transfer to/from your Unraid server can support 2.5Gbe fully?  Same question for anything between the two (switch)?

 

For example, my daily driver PC has a USB nic - It will receive close to 2.5Gb but only send around 1.8Gb.  ITX motherboard so no PCIe slot available.  :(

  • Author
1 minute ago, ConnerVT said:

You have confidence that the system you are using to transfer to/from your Unraid server can support 2.5Gbe fully?  Same question for anything between the two (switch)?

 

For example, my daily driver PC has a USB nic - It will receive close to 2.5Gb but only send around 1.8Gb.  ITX motherboard so no PCIe slot available.  :(

 

Pretty confident - other desktop on Wifie 6E has the same results.

 

Was just tring to turning bridging off as sugegsted in another post, added the router to eth0 and now unRAID is inaccesable. Think I've just bricked my entire NAS...

  • Author
10 minutes ago, siron1992 said:

 

Pretty confident - other desktop on Wifie 6E has the same results.

 

Was just tring to turning bridging off as sugegsted in another post, added the router to eth0 and now unRAID is inaccesable. Think I've just bricked my entire NAS...

 

Sorted this be clearing teh network.cfg file! Back to slow speeds again haha

  • Author

Turned bridging off as per the below, but still no change. @JorgeB any ideas?

ipref results both ways with Driver Plugin and Bridging off. 

image.thumb.png.2e77505ac37610d7d6176a624c6a2e5d.pngbut 

  • Author
  • Solution

Changed cable and much better! 

image.png.52e507e128908108f42fdf91ad4151b6.png

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