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eth0 won't connect faster than 100 Mbps on 1 Gbps port

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I've now changed everything several times and am still getting this issue. I was convinced it must be a cable issue but now even after changing the cables I still get the same problem.

 

I have now tried two different motherboards, three different network cards and three different cables. Every time it won't connect at 1000 Mbps only 100 Mbps.

 

Please ignore all issues with eth1, I know what the issue is there.

fs-diagnostics-20240813-1009.zip

  • Community Expert
Supported link modes:   100baseT/Full
                        1000baseT/Full
                        10000baseT/Full

Advertised link modes:  100baseT/Full

 

The NIC is only advertising 100Mbit support, eth1 advertises all, does that one link at gigabit?

  • Author
24 minutes ago, JorgeB said:
Supported link modes:   100baseT/Full
                        1000baseT/Full
                        10000baseT/Full

Advertised link modes:  100baseT/Full

 

The NIC is only advertising 100Mbit support, eth1 advertises all, does that one link at gigabit?

Could that be a settings issue? Is there a way to reset the card so it tries all speeds?

  • Community Expert

I think that would be a firmware issue.

  • Community Expert

I remember an issue with the Realtek 2.5 USB NICs were you could force advertising 2.5GbE with 

 

ethtool -s eth0 autoneg on advertise 0x80000000002f

 

But not sure the value would be for gigabit, or if it would even work

  • Author
1 hour ago, JorgeB said:

I remember an issue with the Realtek 2.5 USB NICs were you could force advertising 2.5GbE with 

 

ethtool -s eth0 autoneg on advertise 0x80000000002f

 

But not sure the value would be for gigabit, or if it would even work

eth1 can connect at 10 G so it's not a firmware issue. I might have used a ethtool command earlier to force 100. How do I set it back? 

  • Community Expert
7 minutes ago, cinereus said:

How do I set it back? 

If that was the case a reboot would bring it back.

  • Author
8 hours ago, JorgeB said:

If that was the case a reboot would bring it back.

Yes but is there no way without having to reboot? 

  • Community Expert

Not that I know of.

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