Network Adapter Reverted to 10 mbps


PeeBee

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I suddenly started seeing really slow transfer speeds (1 MB/s) to my UnRAID shared folders. A network test using a LAN Speed Test utility (from https://totusoft.com/lanspeed) confirmed that the server network adapter is only running at 10 mbps.

 

Why would the network adapter suddenly drop its speeds to 10 mbps? Is that something that can be changed within UnRAID? (According to the specs it's supposed to be a 10/100/1000 adapter.)

 

If the network adapter has suddenly flaked out can I install a PCIe network card?

 

Any thoughts?

 

I've attached the diagnostics if it will help. 

tower-diagnostics-20200120-0409.zip

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Further to my problem... Here are the results of the ethtool command, confirming that the port is only running at 10 Mb/s:

sudo ethtool eth0
Settings for eth0:
        Supported ports: [ TP ]
        Supported link modes:   10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Full 
        Supported pause frame use: No
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full 
                                100baseT/Half 100baseT/Full 
                                1000baseT/Full 
        Advertised pause frame use: No
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 10Mb/s
        Duplex: Half
        Port: Twisted Pair
        PHYAD: 1
        Transceiver: internal
        Auto-negotiation: on
        MDI-X: on (auto)
        Supports Wake-on: pumbg
        Wake-on: g
        Current message level: 0x00000007 (7)
                               drv probe link
        Link detected: yes

 

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To troubleshoot this I moved one of my Google Wifi access points next to the server and plugged the server into it. Still 10 Mb/s. Just for fun I rebooted the server and it reverted to 1000 Mb/s! I moved the network cable back to the switch and it stayed at 1000 Mb/s, which I confirmed with a network test.

In hindsight I should have rebooted the server as part of my initial troubleshooting process. 

 

I still wonder though why the server suddenly lowered the network adapter speed to 10 Mb/s. It's very odd.

 

Thanks johnnie.black for your help on this. Crisis averted. 

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