No gigabit LAN on 4th gen Airport Extreme

mentaluproar

macrumors 68000
Original poster
May 25, 2010
1,731
130
Ohio, USA
I have connected a Dlink gigabit switch to my airport and found that while anything supporting gigabit is detected at full speed, my airport is not. It is only detected as a fast ethernet device. I have tried other cat5e cables and a factory reset but it doesn't work.

Why doesn't my airport extreme function as a gigabit device?
 

Altemose

macrumors G3
Mar 26, 2013
9,089
444
Elkton, Maryland
I have connected a Dlink gigabit switch to my airport and found that while anything supporting gigabit is detected at full speed, my airport is not. It is only detected as a fast ethernet device. I have tried other cat5e cables and a factory reset but it doesn't work.



Why doesn't my airport extreme function as a gigabit device?

How did you come to the conclusion? Have you tried switching ports on the switch?
 

goMac

macrumors 604
Apr 15, 2004
6,767
783
Are you sure it's a 4th gen? An earlier generation of the 802.11n Airport Extreme (the flat one) did only have 100 megabit ethernet.
 

mentaluproar

macrumors 68000
Original poster
May 25, 2010
1,731
130
Ohio, USA
Airport utility tells me it is a 4th gen. The indicator lights on the switch tell me what speed it is connecting at. My NAS connected to both at gigabit speeds according to the webUI.
 

h9826790

macrumors G5
Apr 3, 2014
12,785
5,598
Hong Kong
There is no way to tell if your AE only running the gigabit LAN at 100Mb/s in Airport Utility. However, you may connect your computer to the AE directly and read the speed from your computer. If that shows you the connection is 1000 base, that means your AE is fine.
 

mentaluproar

macrumors 68000
Original poster
May 25, 2010
1,731
130
Ohio, USA
No gigabit LAN on 4th gen Airport Extreme

I only have the two dlink switches. Both give the same result
 
Last edited:

mentaluproar

macrumors 68000
Original poster
May 25, 2010
1,731
130
Ohio, USA
Aaaaand today, after cleaning up the wiring a bit (nothing connected to the airport) gigabit works. I suppose I have a bad port or a short somewhere. I'll just wait for it to die. The only reason I even use it is because I dont want to use the gateway Time Warner gave me as the backbone of my network. I dislike letting an ISP into my network.
 

AppleDApp

macrumors 68020
Jun 21, 2011
2,409
42
Aaaaand today, after cleaning up the wiring a bit (nothing connected to the airport) gigabit works. I suppose I have a bad port or a short somewhere. I'll just wait for it to die. The only reason I even use it is because I dont want to use the gateway Time Warner gave me as the backbone of my network. I dislike letting an ISP into my network.
So how are things setup?
 

sgjohnston

macrumors newbie
Dec 14, 2009
24
0
Aaaaand today, after cleaning up the wiring a bit (nothing connected to the airport) gigabit works. I suppose I have a bad port or a short somewhere. I'll just wait for it to die. The only reason I even use it is because I dont want to use the gateway Time Warner gave me as the backbone of my network. I dislike letting an ISP into my network.
Gigabit ethernet uses two extra pairs in the cable, so if one wire in an extra pair is broken (intermittently?), or the connection is poor, the link will negotiate at 100mb/s. I once spend a few hours on that problem, only to discover that the cable only had two pairs in it, rather than 4 - it came with a broadband modem and was only intended for 100mb/s.