Ubiquiti EdgeRouter X - One port not working at gigabit

[snowfox99]

So I've been using a Ubiquiti EdgeRouter X for my home network and it's been fantastic for the most part, except recently, no matter what device I plug into port4, it only is able to negotiate a link speed of 100mbps. Plugging the same exact device with the same exact cable into another port gives me gigabit full duplex with no issues.

 

Anyone else experienced this?

[Dujith]

Port 4 is a passthrough for Passive Poe. Meaning that pins 4,5,7,8 are just for power. So you are left with 4 pins that will do 100Mbit max.

[dj_ripcord]

Port 4 (eth4) on the Edgerouter X is a PoE 24v passive port.

 

What you're experiencing is a limitation of passive PoE if i'm not mistaken.

[beyonddc]

Learned something new here.

 

I am looking at my EdgeRouter X right now, and I am only using eth0 to eth2  If I were going to use eth3 then I probably would have the same question as well.

[snowfox99]

On 10/30/2018 at 1:01 PM, Dujith said:

Port 4 is a passthrough for Passive Poe. Meaning that pins 4,5,7,8 are just for power. So you are left with 4 pins that will do 100Mbit max.

https://dl.ubnt.com/datasheets/edgemax/EdgeRouter_X_DS.pdf if you look at page 5 of the datasheet it clearly says that the POE port does 10/100/1000. Very misleading on Ubiquiti's part.

[Dujith]

@snowfox99 @beyonddc @dj_ripcord

 

Seems i was a bit hasty and based my comment on my experience with older passive POE.

Seems that a while ago passive POE also became gigabit in 2 flavors:

 

Version A: Pin 1/2 Data&V- , Pin 3/6 Data&V+
Version B: Pin 4/5 Data&V+ , Pin 7/8 Data&V-

 

Main difference with the 802.3af/at standard is that its well... passive, meaning there is no negotiation about if power is needed.

The Passive POE ports are just always on.

 

So port 4 is a Gigabit port, but maybe in the settings its set as something else. How are you powering the Edgerouter?

You could also try to force Gigabit in the settings