I am guessing you are not so concerned with logging.. which Bob has given you the necessary info for.. but are actually pretty useless as the logs don't tell you anything about bandwidth usage.
I have read how apple did not design in the ability to monitor network traffic of this router.
Worse .. Apple removed the ability that existed in Gen5 and earlier Extreme or Time Capsule. I am not sure about the Express.
To use the Gen5 airport extreme along with the AC model (not officially Gen6 but we do call it that).
Sort of depends on how your network is setup.
What is your main modem and broadband type?
What speed are you getting? ISP spec and real world. Upload and download please.
If you use a pure modem or bridged modem router.. then you can replace the Gen6 with Gen5 to handle routing duties.. and plug the Gen6 into Gen5 to act as Wireless AP.
If your main modem is actually a router/gateway. You can check the specs if it has SNMP available.. almost any decent router will support SNMP. It can also work with UPNP if the router has sufficient controls.
Then you need an application for the computer to read the SNMP data.. eg on a Mac is PeakHour. This is a very good app and fairly cheap. It will tell you usage of all the device.. but remember your computer must be on 24/7 to read the info. There is a free download to check your ISP router.
The other method which I recommend is a router with proper bandwidth controls.
1. Cheapest is something that takes a third party like Gargoyle firmware. You need to buy a suitable router and flash it.. which is like any other firmware update.. not difficult but important you choose exactly the right hardware and firmware.
I am not allowed on the forum to point you to the firmware.. but please see this post.
Re: How do I enable SNMP on Airport Extreme 802.11ac?
Gargoyle is stand out if your needs are not too great in terms of speed. It works exceptionally well and includes quota controls. A new TP-Link C7 is around $100US so not a seriously heavy outlay.
If your speeds are lower like 50Mbps an older WNDR3800 from ebay is probably around $10.
None of the other methods have quota.
2. A router with built in controls.
About the best of these is Asus models from RT-AC68U and up. They are fairly expensive but the firmware is excellent.. and there is a special version called Merlin with even more controls. It cannot control in the way Gargoyle does but includes excellent QoS and Throttling in the latest versions.
3. A linux based router.
Ubiquiti or Mikrotik.
These are highly configurable semi-pro type routers.. fairly cheap actually to buy but you need to learn the OS. It is a steep learning curve so not to be undertaken lightly.
You can also DIY using a software router like PFsense. End result is much the same as using actual router but will use a PC.
