Strange indeed. I would leave hubiat at Auto though, not fixed. (Fixed 100 has cause problems with packet speed). I'm wondering if for some odd reason it's expecting 1gb vs 100mb and it thinks something is off. Either way it seems if it's on the router end. In the end if everything is working as expected I wouldn't worry about it. Also curious, does it say what the problem is? If not that's a crappy diagnostic tool.
Not sure what that means. Did you change it to 100, fixed? Which end, HE or router? If one end is set to autonegotiate, the other (fixed) end must also be set to half duplex, or you'll have issues.
Do you mean an address reservation in the router, or a static IP assigned in the HE?
I suspect your router is just wrong, and not made to expect anything outside a simplistic DHCP only network which it controls.
I'm going to go with @rlithgow1 and @mikes suggestion that the router may just be dumb enough to see a problem where there isn't one. My switches will show these as a color other than green (colorblind so I'm not sure what they actually are, maybe yellow or just a lighter green? All a mystery to me other than they are different), but won't actually identify them as needing attention.
One thing you could do is validate there is no packet loss... ping your router from another device for a while and see if it generates any errors. A crude test but if there is a serious problem it should show up.
I repatched the Hubitat into a switch which is connected to the router and the diagnostics test is now successful, which for me is not optimal but I can live with it
Answer to queries
auto-negotitate : in Network Setup I changed the setting for internet speed from "Auto Negotiated" to "Fix 100mbps" and back again. Test result was the same
Fixed IP : Hubitat has a static IP address and is not using DHCP. On the router I have reserved a range of IP number, so that I can assign a fixed IP number when required. I have verified that the assigned number is within this range and also confirmed that the number is not assigned to another device.
Router port Speed - I have not been able to find a way to change the port speed on the router
Find attached samples of a failed diagnostics test and a successful one.
What @FriedCheese2006 has written is right on the mark! The "error" provided by your router's interface confirms it ....
Hubitat's ethernet interface is limited to 100 Mbps, which is more than sufficient for its use, and off course, this will have zero impact on the rest of the devices on your LAN.
But your router doesn't know that the Hubitat hub is not something like an ethernet switch. And, if it were a switch, the 100 mbps interface would be limiting for all the devices connected to that switch - especially if those devices were capable of gigabit networking.
If I were you, I would connect the Hubitat directly to your router, ignore the error, and go on using it. It will have zero impact on your LAN. In this instance, that error is irrelevant.
Lol. MIS used token ring for the AS400s. They also connected Ethernet to it. They gave us, Engineering, our own segment in the Ethernet network. After we were up and running their system administrator told us we were the only portion of the network that had “enough traffic to measure”.
Was just last year I purged an old Bay Networks token ring switch I had up on a shelf. Forgot I even had it until we were moving. Heh, I should have sold it on antiques road show...LOL. Though back in the 90's I used 10 Base T to run my bbs that I had (Wow, I had 2 bbs's over the course of a decade...I'm farking old....)
I beta tested one ofArtisoft's new ethernet cards back in the day. They were going for a package. Concept died on the table once windows 3.1 WFW came out.
