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Speed drop 50% after airport extreme (as a router)

Speed test:

(1) modem LAN to MacBook = 950kbps

(2) modem LAN to WAN of Airport Extreme(AE), LAN of AE to MacBook = 504kbps.

was told by internet provider that there should not be a drop of speed across AE as a router.

Router mode of AE is set to "DHCP and NAT". I have CCTV connected to the network via port setting.

Other than CCTV, i have no clients in my network that need to be accessed from the outside world.

The modem is 'Nucleus Connect' provided by the internet provider which i cannot change.

Is there configuration or setting in the AE router that i should look at to improve the speed ?


I have another AE which is setup in "bridge" mode. If i replace the router with this "bridge" mode AE and repeat the test above, the speed does not drop. So it has to do with some setting of the router. If there is a speed drop to be expected across the AE router, what is the acceptable range ?


Many thanks in advance.

Posted on Jul 16, 2020 2:29 AM

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13 replies

Jul 16, 2020 11:17 PM in response to Bob Timmons

From the smallnetbuilder link above, i was not able to see the Airport Extreme (AE) data. I attached an image at the bottom of this page(note that in 'WAN to LAN tcp" benchmark, APPLE name was not in the BRAND selection box.

It will be great if you can take an image of AE's WAN to LAN speed test data for me if it is available to you.


For the WAN to LAN reduction in AE setup as router, is the reduction in speed relative to the ISP speed or it is an absolute speed limit of AE ? Meaning if my modem can provide 2Gbps (instead of 1Gbps now), would i expect to receive a speed significantly higher than the 504Mbps that i am receiving now from the AE LAN port ?


ON a separate topic, can i see a list of connection (LAN and WiFi) on the network through AirPort Utility ? Currently i can only see the details of the clients that are connected by WiFi. I could not find the details of clients that are connected to the network (thru router & bridge units) by LAN.


On the Airport Utility, "Wireless Clients" > "connection" > "data rate" can be as high as 1300Mb/s for MacBook. What speed is this referring to pls ? Ookla speed test on the same MacBook show around 300-400Mbps only.


Attached below: image from smallnetbuilder website...

Jul 16, 2020 5:41 AM in response to Allan2020

Is there configuration or setting in the AE router that i should look at to improve the speed ?


No, the AirPort Extreme is doing great to provide about half the speed of your Internet connection when it is configured as a DHCP and NAT router. Most test reviews on the AirPort Extreme have it typically delivering 400-450 Mbps when configured in router mode.


Mine checked out at about 425 Mbps the last time I had the chance to test it on a 1,000 Mbps connection.


Remember that the Airport Extreme was designed in 2012-2013 timeframe and Apple never improved the hardware, so you'll need to look at a new router if you want to get up to 800-900 Mbps range.



Jul 16, 2020 7:04 AM in response to Bob Timmons

Thanks for the prompt reply ! What does it do if i change the router mode to "DHCP-only" ? More importantly would this change improves the speed pls ? Downstream from this AE router, it is connected to a Giga-switch, from there it is linked to 3 Airport Extreme (setup as bridge) and 3 Airport Express (also setup as bridge), 2 printers, CCTV server, 2 apple TV all connected by LAN.


Alternatively, If i replace this Airport Extreme router with Eero Pro Mesh WiFi Router (as an example, any recommendations pls) to increase the internet speed, and connect it to the Giga-switch, would the Airport Extreme and Express that are setup as bridge still work as a "Mesh" as it is now when i go to different level of the house and at different rooms pls ?


Many thanks again.

Jul 16, 2020 10:53 AM in response to Allan2020

You won't be able to use the DHCP Only mode if you have a simple modem.......the kind with only one Ethernet port......which it sounds like you have, but we'll need to check to be sure on that.


If you are not sure what type of modem that you have, post back with the make and model number of the modem and we'll see if we can find some information about the product.


DHCP Only would be used only in the event that you already have another router "upstream" from the AirPort Extreme, but for some reason you want the AirPort Extreme to handle DHCP IP Address assignments for the network. Normally, if you had a router "upstream" from the AirPort, you would set up the AriPort in Bridge Mode to let the upstream router handle DHCP and NAT for the network.


The DHCP Only setting is something of a hybrid that I have not used in some time. Can't remember whether it had any effect on speed improvement over the DHCP and NAT setting.


Alternatively, If i replace this Airport Extreme router with Eero Pro Mesh WiFi Router (as an example, any recommendations pls) to increase the internet speed, and connect it to the Giga-switch, would the Airport Extreme and Express that are setup as bridge still work as a "Mesh" as it is now when i go to different level of the house and at different rooms pls ?


No, the AirPorts will not communicate with the Eero router at all as far as mesh his concerned, so if you went with Eero....or any other mesh system for that matter, you would want to go the total replacement route, not try to piecemeal things.


Mesh systems are designed to work as a unified system among multiple devices, but they won't work effectively if you try to mix in other brands into the network.


WAN to LAN speeds are notoriously missing from the specification sheets of most routers. Like Apple, they might say that the AirPort Extreme has a Gigabit or 1,000 Mbps WAN port, but they don't tell you that the real processing power of the router is about a third to half of that speed. You have to get into really detailed router tests to find out what things are really like.


Take a look at the Router Tests provided by Small Net Builder as a good resource.


https://www.smallnetbuilder.com/tools/charts/router/bar/179-wan-to-lan-tcp/35




















Jul 17, 2020 6:44 AM in response to Allan2020

i was not able to see the Airport Extreme (AE) data.


The AirPort Extreme was discontinued by Apple over 2 years ago. A few years ago, when it was still current, the WAN to LAN speed of the AirPort was about 350-375 Mbps in the Small Net Builder tests as I recall.


For the WAN to LAN reduction in AE setup as router, is the reduction in speed relative to the ISP speed or it is an absolute speed limit of AE ?


Top speed on the AirPort is usually about 350-400 Mbps when it is configured as a DHCP and NAT router. The AirPort simply does not have have the processing power to handle much more than that. Remember, this product was designed in the 2012 timeframe when ISP speeds topped out in the 200-300 Mbps range. Most were less than 100 Mbps.


As I mentioned before, WAN to LAN speeds are not displayed in the specification sheets for most products, so unless you can get a hold of that number, you won't know what kind of Internet connection speed that the router is capable of handling. If you can't find a given product in the router test chart, it is either out of date or it has not yet been tested.


can i see a list of connection (LAN and WiFi) on the network through AirPort Utility ?


If you open AirPort Utility and click on the picture of the AirPort, a small window will appear with some basic information about the AirPort. Wireless Clients displays a list of the WiFi devices that are connected to the AirPort Extreme at that time. The WiFi devices might appear with their normal name, as an IP address, or as a hardware or MAC address.


Do the same for the other AirPorts on the network to see the WiFi clients that are currently connected to that given AirPort at the time.


Ethernet connected clients are not displayed in AirPort Utility, a serious mistake that Apple never corrected. They must assume that the world connects using only WiFi.


On the Airport Utility, "Wireless Clients" > "connection" > "data rate" can be as high as 1300Mb/s for MacBook. What speed is this referring to pls ?


That is the theoretical maximum speed at which a WiFi device can connect to the AirPort Extreme. The actual throughput is usually about half of the number displayed. So, if you had your Mac connected to a WiFi hard drive like a Time Capsule, the Mac could talk to the Time Capsule at higher speeds over the "local" network because your Internet connection would not be involved when the Mac was simply talking to the Time Capsule to back up data.


But, this same 1300 Mbps impressive looking number is meaningless if you are asking about the Internet connection speed. That is determined by the speed that your ISP provides and the processing power of the network router, in addition to the quality of the connection between the Mac and the router.


The Ookla test displays the Internet connection speed that is available to your Mac at the time.














Jul 21, 2020 4:02 AM in response to Bob Timmons

Hi Bob, thanks for all the replies.

Pls refers to the answers you gave above on my question previously :

Alternatively, If i replace this Airport Extreme router with Eero Pro Mesh WiFi Router (as an example, any recommendations pls) to increase the internet speed, and connect it to the Giga-switch, would the Airport Extreme and Express that are setup as bridge still work as a "Mesh" as it is now when i go to different level of the house and at different rooms pls ?


I read in other post you have mentioned that 2 routers of different brand [one is Airport Extreme(AE)] can be connected in series. If I insert an airport extreme between Eero and the Giga-switch above so that i have setup below:

ISP modem > Eero router > AE#1 (mode?) > Giga-switch > multiple AE & AirportExpress as bridges to AE#1

My objective is to increase speed because Eero router has a much better Throughput speed (825Mpbs according smallnetbuilder.com), while maintaining a "mesh" functionality among the Airport bridges. To do that, what mode should i set for AE#1 (DHCP+NAT or DHCP-only or Bridge) ? Is this setup possible to achieve my objective of increase speed but retain Mesh functionality among the airport bridges ? As i learn that Airport extreme as bridge has a much higher throughput speed, so if eero is the router doing the heavy processing, how do i get to maintain the "mesh functionality"? is there any other way to do this? As you pointed out previously, the best way is to replace the entire system with eero, but cost is a concern, and preferably i would want to wait for router with AX (WiFi6) functionality or 5G system established before i migrate to a new system.

Many thanks again.


Jul 21, 2020 6:04 AM in response to Allan2020

If you are asking if the AirPorts can work along with the Eero system, the answer is "yes"......sort of.


The whole idea of mesh is that different WiFi devices can move all over the home and connect to the closest mesh device. So, the mesh system "hands off" a WiFi device like a Mac laptop from one mesh remote to another seamlessly. The main router and mesh remotes all communicate with each other to keep track of which WiFi devices are being handled by which mesh router or remote.


You could connect the AirPorts to the mesh system using an Ethernet connection and configure them in Bridge Mode to provide a WiFi network that uses the same wireless network name and password as the mesh system.


But......the AirPorts are not going to communicate with the mesh system to keep track of devices on the network and update all the other mesh units on current status.


So, you might have laptop connected to one of the mesh units and move it close to an AirPort. Whether or not the laptop will switch from the mesh unit to pick up the signal from the AirPort is open to question. The same applies if the laptop was originally connected to an AirPort signal and then it was moved close to one of the mesh units.


Bottom line in very simple terms.......you are trying to mix parts from a Ford with parts from a Honda and make an automobile. So, that is not going to work very well.


IF......you want to think of the mesh system and the AirPort part of the setup as two separate WiFi networks, then things might work in that way.


My advice is to keep it simple and go with the same manufacturer for all of your WiFi signal devices.

Jul 21, 2020 8:37 AM in response to Bob Timmons

Qoute from your reply above: "IF......you want to think of the mesh system and the AirPort part of the setup as two separate WiFi networks, then things might work in that way."

Actually my intention was not to use the Eero WiFi system at all, the Eero router is there for the sole purpose of getting around the throughput speed limitation of AE as a router. So if i setup as 2 separate WiFi networks as you suggested, what mode should i select for the AE#1 below pls ? If you are not sure just give your best guess, i will borrow a router (may not be Eero) to try it out.

Since i will not be using the Eero WiFi, i can set the Eero WiFi to a different name & passport word from the airport network name & password right ?

ISP modem > Eero router > AE#1 (mode?) > Giga-switch > multiple AE & AirportExpress as bridges to AE#1

Many thanks for your patient.

Jul 21, 2020 9:38 AM in response to Allan2020

what mode should i select for the AE#1 below pls ?


Bridge Mode, which Apple calls "Off (Bridge Mode). Any other AirPorts would also be configured exactly the same way. All that you really need to do here is change the Router Mode setting on AE#1 from DHCP and NAT to Off (Bridge Mode).


Since i will not be using the Eero WiFi, i can set the Eero WiFi to a different name & passport word from the airport network name & password right ?


Correct. But, if you don't plan to use the Eero WiFi, there may be a setting on the Eero router......like there is on the AirPorts.......to simply turn off the WiFi function of the Eero and use it only as a wired router. This would eliminate any possible WiFi interference issues that can sometimes occur when you have two WiFi networks in close proximity.


In a more practical sense, it does not make much sense to have a WiFi network signal being broadcasted if you aren't going to use it.


SP modem > Eero router > AE#1 (mode?) > Giga-switch > multiple AE & AirportExpress as bridges to AE#1


SP modem > Eero router > AE#1 Bridge Mode > Giga-switch > multiple AE & AirportExpress as bridges to AE#1


Not sure if you are aware that the Ethernet ports on the AirPort Express will only support speeds up to 100 Mbps, so any WiFi devices that connect to an AirPort Express are going be limited to 100 Mbps speeds. More likely, that figure will be 70-80 Mbps.


If you are going to use the AirPort Expresses only for AirPlay, it would make sense to turn off the WiFi function on the Expresses to keep devices from connecting to an Express for WiFi.















Jul 22, 2020 7:13 AM in response to Bob Timmons

I did the test with setup below today

ISP Modem > Linksys (router) > AE#1 > 8.5m LAN > AE#2

AE#1 is a clone of my current router except that it is switch to "bridge" mode as advised

AE#2 is a also a clone of my current "bridge" unit to AE#1

before the test, Linksys alone give a WiFi speed of 500Mbps, AE#1 standalone as router (DHCP/NAT mode ) at 200-250Mpbs.

with the setup above, AE#1 provide a marginally higher speed to 250-350Mps. The bigger improvement come from LAN speed, which virtually maintained at 700Mbps (from 500Mbps previously).

The other interesting thing to note is that the AE#1 & AE#2 does maintain the "Mesh" functionality despite both units are on Bridge mode. When i first turn on the WiFi of the phone or MacBook, it will log on to the linksys WiFi as it's the strongest. But once i select the AE Wifi network, it will switch between the units as i move from one unit to the other as shown on "Airport Utilities", and the network will not drop or switch back to linksys WiFi anymore !


As the improvement is marginal, don't think it is worthwhile to put a new router in front of my AE network currently. Those clients that are connected by LAN are not suffering from speed yet !


Thanks Bob, really grateful for all the advice you have been giving here and on other posts as well !!



Speed drop 50% after airport extreme (as a router)

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