Netgear R7450 branded AC2600 when DDWRT treats it as AC1900?

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Rocketboy235
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PostPosted: Sun Sep 12, 2021 1:06    Post subject: Netgear R7450 branded AC2600 when DDWRT treats it as AC1900? Reply with quote
Hello,

I'm trying to better understand this router. So this router is marketed as AC2600 but when flashing DD-WRT on it, it is treated as the R6800 model which is AC1900. I heard that the hardware between the R6800 and R7450 is similar but now I'm wondering if it was just marketing BS by Netgear that the R7450 is claimed to be capable of doing AC2600 when it is only capable of doing AC1900? Or maybe it is an AC2600 router and DD-WRT isn't able to fully utilize the router's max potential as of yet?

Also read somewhere that someone claimed the R7450 has 4 Antennas and DD-WRT can only run 3 of them (not sure if that is true).

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kernel-panic69
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PostPosted: Sun Sep 12, 2021 1:36    Post subject: Reply with quote
I will pre-empt a possible response by the man himself in saying that there were several devices with nearly identical hardware added at the same time. Nobody is reporting on all of them to see what each are detected / identified as. This includes a wireless extender. My vote is for a quick and dirty port and worry about cosmetics later.
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ho1Aetoo
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PostPosted: Sun Sep 12, 2021 7:21    Post subject: Reply with quote
http://en.techinfodepot.shoutwiki.com/wiki/Netgear_R7450

they also all seem to have the same FFC ID "PY316200344"

Netgear Nighthawk AC2100
Netgear Nighthawk AC2400
Netgear R6700 v2
Netgear R6800
Netgear R6900v2
Netgear R7450

https://fccid.io/PY316200344/Internal-Photos/Internal-Photos-rev-3256256

and as you can see from the internal photos they also have an internal 4th antenna

now the question would be how you come to the assumption that dd-wrt can only control / uses 3 antennas ?

in the advanced wlan settings are the antenna chains shown, do you see 3 or 4 antennas?
turbowells
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PostPosted: Sun Sep 12, 2021 12:49    Post subject: Reply with quote
ho1Aetoo wrote:
...in the advanced wlan settings are the antenna chains shown, do you see 3 or 4 antennas?


I checked my unit. It shows four antennas.
ho1Aetoo
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PostPosted: Sun Sep 12, 2021 13:10    Post subject: Reply with quote
then it is best to additionally look in the CLI

Code:
iw dev wlan0 station dump

iw dev wlan1 station dump


there see if the antennas also have equal reception

Code:
   signal:     -54 [-62, -58, -61, -58] dBm
   signal avg:   -57 [-65, -62, -64, -62] dBm


in the brackets [ ] these are the 4 antennas

but everything will be OK although the 4. antenna has a different design
turbowells
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PostPosted: Sun Sep 12, 2021 13:41    Post subject: Reply with quote
ho1Aetoo wrote:
then it is best to additionally look in the CLI

Code:
iw dev wlan0 station dump

iw dev wlan1 station dump


there see if the antennas also have equal reception

Code:
   signal:     -54 [-62, -58, -61, -58] dBm
   signal avg:   -57 [-65, -62, -64, -62] dBm


in the brackets [ ] these are the 4 antennas

but everything will be OK although the 4. antenna has a different design



Code:

wlan0:
        signal:         -55 [-65, -63, -55, -67] dBm
        signal avg:     -55 [-65, -62, -55, -68] dBm
wlan1:
        signal:         -55 [-64, -59, -55, -59] dBm
        signal avg:     -53 [-63, -56, -54, -58] dBm


There's some chatter on the SD forum about DD-WRT not supporting the full potential of the R7450. No evidence was provided to support that conclusion. I suspect that is where the initial question in this thread came from.
ho1Aetoo
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PostPosted: Sun Sep 12, 2021 14:57    Post subject: Reply with quote
This looks OK to me.
dd-wrt recognizes the chip as 4x4 and the chip also receives signal with 4 antennas.
I don't see a very bad antenna in the chain.

So if there are problems it is not because the router works with 3 instead of 4 antennas.
Rocketboy235
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PostPosted: Sun Sep 12, 2021 18:40    Post subject: Reply with quote
kernel-panic69 wrote:

I will pre-empt a possible response by the man himself in saying that there were several devices with nearly identical hardware added at the same time. Nobody is reporting on all of them to see what each are detected / identified as. This includes a wireless extender. My vote is for a quick and dirty port and worry about cosmetics later.


That makes sense. Thanks!

ho1Aetoo wrote:

and as you can see from the internal photos they also have an internal 4th antenna

now the question would be how you come to the assumption that dd-wrt can only control / uses 3 antennas ?

in the advanced wlan settings are the antenna chains shown, do you see 3 or 4 antennas?


Thanks for the tip. I have yet to flash DD-WRT on my R7450s but will be doing that soon. Reason why I asked that question about 3 antennas instead of 4 was because another person on a different site mentioned that so it got me wondering.

turbowells wrote:

There's some chatter on the SD forum about DD-WRT not supporting the full potential of the R7450. No evidence was provided to support that conclusion. I suspect that is where the initial question in this thread came from.


That's correct. I was looking at that earlier and I was quite confused and decided to see if the people here can clarify. I bought 2 from that deal just to give it a shot since my EA8500 (which I also got from a SD deal a few years ago) has some strange issues (though I have some workarounds to kind of make it suitable).

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DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
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