Flint2 - MT6000 - 2.5gb LAN Port not working!

Technical Support for Routers
1

I've only had this new MT6000 router for a few days, and it's mostly working great. However, I've encountered an issue I can't seem to resolve.

I'm trying to connect the 2.5Gb LAN port (lan1) on the router to the 2.5Gb port on my access point. When I do this, the connection completely fails. It doesn't establish a connection at all.

If I connect to one of the 1Gb LAN ports on the router, the connection is established without any issues.

I've tested the connection between my access points using their 2.5Gb ports, and they connect at the correct 2.5Gb speed. This suggests that the ports on the access points are fine, and the issue lies with the MT6000 router.

There must be some configuration issue on lan1 of the MT6000 that prevents it from establishing a connection when attempting to connect to a 2.5Gb port. I've also tried various cables to rule out any cable-related problems.

Could someone please help me with this issue? Thank you!

2

Hello,

What is the NIC network card model of the LAN1 client device?

Generally there may be network port compatibility issues, resulting in less than 2.5G negotiation.
But you mentioned that you cannot connect at all, I may need syslog to check if there is a hardware issue with the LAN1 port.

Please try the following:

  1. Try plugging and unplugging several times to see if it can negotiate and establish a connection.
  2. Try to check the "Advertised link modes" and "Link partner advertised link modes" on the network port: ethtool lan1
  3. Try open-source firmware 4.7.0-op24 to see if there is any improvement
  4. If no luck, please PM me the issue syslog.
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4

Thank you for the detailed reply!

I've been investigating in the interim and after using ethtool, I seems that the Flint2 is advertising 2.5Gb however, I did notice auto negotiation was disabled. Is this normal? I don't recall changing it this.

I'm going to investigate further, later today. I'm going to factory reset just to be absolutely sure it's nothing I have changed.

Having said all that. I think there might be an issue with compatibility ok the access point side. It's strange when either side is connected to a 1Gb port, I works absolutely fine!

I'll update you later. Thanks :blush:

5

I upgraded to 4.7.0-op24 and the problem is still there however, after a thorough test, I don't believe there is an issue with the Flint 2.

ethtool was very helpful and I was able to identify that the lan1 port on the Flint 2 was behaving correctly. Additionally, I tried the stock firmware with one of my access points (OpenWRT is unofficial) and it worked fine. So it's likely a driver/kernal mismatch with the stock firmware.

Apologies if I wasted your time. I will mark this as solved. Thank you!

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