CTF for Access Point?

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sunny0_0
DD-WRT Novice


Joined: 27 Nov 2019
Posts: 23

PostPosted: Sun Aug 29, 2021 9:47    Post subject: CTF for Access Point? Reply with quote
For a secondary router setup as an access point, does the ctf option do anything? Since NAT is disabled, I guess it does nothing? The AP is used for both lan and wifi connections.

The primary router has ctf and fa enabled. Both devices are R6300v2's.

Edit: Both running r47256.


Last edited by sunny0_0 on Mon Aug 30, 2021 5:37; edited 1 time in total
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egc
DD-WRT Guru


Joined: 18 Mar 2014
Posts: 12877
Location: Netherlands

PostPosted: Sun Aug 29, 2021 13:50    Post subject: Reply with quote
If you post we can give better support if you follow the forum guidelines (e.g. always stating router model and build number):
https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087

To answer your question the router is just acting as a switch which already will get you full Gigabit speed.
Acceleration is LAN<>WAN (NAT)

_________________
Routers:Netgear R7000, R6400v1, R6400v2, EA6900 (XvortexCFE), E2000, E1200v1, WRT54GS v1.
Install guide R6400v2, R6700v3,XR300:https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=316399
Install guide R7800/XR500: https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=320614
Forum Guide Lines (important read):https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=324087
tedm
DD-WRT Guru


Joined: 13 Mar 2009
Posts: 555

PostPosted: Sun Aug 29, 2021 18:46    Post subject: Re: CTF for Access Point? Reply with quote
sunny0_0 wrote:
For a secondary router setup as an access point, does the ctf option do anything? Since NAT is disabled, I guess it does nothing? The AP is used for both lan and wifi connections.

The primary router has ctf and fa enabled. Both devices are R6300v2's.


In my testing CTF does indeed change how the wifi driver acts speeding up some clients slowing others. I don't understand why because it makes no logical sense. There is a very long wifi article linked to in this thread:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=329869

that is good reading for your wifi questions.

I do not believe that any wifi protocol at this time is fast enough to even come close to overrunning the CPU in a Netgear R6300v2 so if CTF acted logically it would not make a difference. But CTF doesn't act logically, or at least, not by what logic we understand of how it works.

When I dove into CTF I thought initially that Broadcom had implemented it -entirely- in software and that the FA code was using hardware acceleration. But I am not so sure that is the case anymore.
sunny0_0
DD-WRT Novice


Joined: 27 Nov 2019
Posts: 23

PostPosted: Mon Aug 30, 2021 5:51    Post subject: Re: CTF for Access Point? Reply with quote
tedm wrote:
sunny0_0 wrote:
For a secondary router setup as an access point, does the ctf option do anything? Since NAT is disabled, I guess it does nothing? The AP is used for both lan and wifi connections.

The primary router has ctf and fa enabled. Both devices are R6300v2's.


In my testing CTF does indeed change how the wifi driver acts speeding up some clients slowing others. I don't understand why because it makes no logical sense. There is a very long wifi article linked to in this thread:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=329869

that is good reading for your wifi questions.

I do not believe that any wifi protocol at this time is fast enough to even come close to overrunning the CPU in a Netgear R6300v2 so if CTF acted logically it would not make a difference. But CTF doesn't act logically, or at least, not by what logic we understand of how it works.

When I dove into CTF I thought initially that Broadcom had implemented it -entirely- in software and that the FA code was using hardware acceleration. But I am not so sure that is the case anymore.


Thanks for the link and the perspective. It looks like enabling CTF on AP's, for my old router at least, doesn't really do much (or it does *shrug* something differently and doesn't break anything).
Since the option to enable it is present I'll just leave it enabled. With or without the option it seems I've maxed out my wifi speed anyway for both the router and clients.

I'm happy that CTF + FA is working well on the primary router and taking advantage of my fiber connection!
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