Is the RT-AC68U V4 HND?

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RMerlin

Asuswrt-Merlin dev
Yes.
 

capncybo

Regular Contributor
It's the name of the Broadcom platform used by their newer models starting with the RT-AC86U. Typically means the CPU is a BCM490x or a BCM675x.
Sooooo... Now I'm confused if HND started with the RT-AC86U but the RT-AC68U is a far Older router. How could the older router possibly be a HND???
 

sfx2000

Part of the Furniture
What does 'HND' stand for (and what it mean)?

HND - Home Networking Division

As noted by the source code and man pages for the linux bhnd driver..


The bhnd driver provides a unified kernel bus interface to the on-chip interconnects used in Broadcom Home Networking Division (HND) devices.

The Broadcom HND device family consists of SoCs (System On a Chip) and host-connected chipsets based on a common library of Broadcom IP cores connected via an internal hardware bus architecture. Drivers for these cores are implemented against the unified bhnd interface.

The Sonic Inc. Silicon Backplane used in earlier HND devices is supported by the siba BHND driver.

The ARM AMBA-based interconnect used in later HND devices is supported by the bcma BHND driver.
 

maxbraketorque

Very Senior Member
Sooooo... Now I'm confused if HND started with the RT-AC86U but the RT-AC68U is a far Older router. How could the older router possibly be a HND???

The V4 is a new version that is just now being released. You could consider it a new model with an old name and the original wifi capabilities, although there are likely to be some new features with the V4.
 

RMerlin

Asuswrt-Merlin dev
Sooooo... Now I'm confused if HND started with the RT-AC86U but the RT-AC68U is a far Older router. How could the older router possibly be a HND???
The RT-AC68U V4 is a major hardware revision. One of the nice benefits is it gets AES hardware acceleration:

Code:
ASUSWRT-Merlin RT-AC68U_V4 386.3_alpha1-g0d9656cad9 Thu Apr 15 02:26:35 UTC 2021
[email protected]:/tmp/home/root# cat /proc/cpuinfo
processor    : 0
cpu model    : ARM
BogoMIPS    : 100.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer    : 0x42
CPU architecture: 8
CPU variant    : 0x0
CPU part    : 0x100
CPU revision    : 0

processor    : 1
cpu model    : ARM
BogoMIPS    : 100.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer    : 0x42
CPU architecture: 8
CPU variant    : 0x0
CPU part    : 0x100
CPU revision    : 0

And also 128 KB of nvram instead of 64 KB.
 
Last edited:

capncybo

Regular Contributor
The RT-AC68U V4 is a major hardware revision. One of the nice benefits is it gets AES hardware acceleration:

Code:
ASUSWRT-Merlin RT-AC68U_V4 386.3_alpha1-g0d9656cad9 Thu Apr 15 02:26:35 UTC 2021
[email protected]:/tmp/home/root# cat /proc/cpuinfo
processor    : 0
cpu model    : ARM
BogoMIPS    : 100.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer    : 0x42
CPU architecture: 8
CPU variant    : 0x0
CPU part    : 0x100
CPU revision    : 0

processor    : 1
cpu model    : ARM
BogoMIPS    : 100.00
Features    : fp asimd evtstrm aes pmull sha1 sha2 crc32
CPU implementer    : 0x42
CPU architecture: 8
CPU variant    : 0x0
CPU part    : 0x100
CPU revision    : 0

And also 128 KB of nvram instead of 64 KB.
I recently just bought myself a second RT-AC68U from Amazon.ca to try AiMesh & use as a Node. Your post had me hoping I got lucky... so SSH'd into the Node through my older one & into the newer unit...
BOOOO...
Apparently no aes for me ;-(
 

RMerlin

Asuswrt-Merlin dev
I recently just bought myself a second RT-AC68U from Amazon.ca to try AiMesh & use as a Node. Your post had me hoping I got lucky... so SSH'd into the Node through my older one & into the newer unit...
BOOOO...
Apparently no aes for me ;-(
That new model should be hitting retail around now or in November (it got delayed a number of times in the past).

I also expect retailers to clearly label it as a V4 - no idea how pricing will be affected.
 

doczenith1

Very Senior Member
It's amazing how long the 68U had endured albeit a reincarnation with the V4. I still use a Best Buy 68U as my RV router (USB tether) on weekend camping excursions.
 

CaptnDanLKW

Regular Contributor
It feels like the new AC68U v4 is just an AC86U with the trusty 68U name. All assumptions about its limitations (tight NVRAM), architecture (entware packages, 64bit), partition layout, NVRAM variables in /jffs, etc. will no longer apply. While I'm excited, (I expect one of my AC86Us is approaching its expiration date and this could be a good replacement) I have this unfortunate feeling that ASUS Marketing has learned nothing from the AC68U / AC86U naming confusion.

Then again, it *IS* marketing and they know AC68U is well liked and trusted, so slap a V4 on it and send it.

I can already see the threads "I can't flash", "problem with my 68U", 'Which Version are you running?"
 

RMerlin

Asuswrt-Merlin dev
That is a valid point that someone over at Asus might not have considered...
They did. The RT-AC68U firmware now contains both images in a single file. Which is a bad idea IMHO, because routers that are low on free memory will experience even more difficulties than before to complete the flash. This is why I am considering on my end to release both images separately.
 

sfx2000

Part of the Furniture
The RT-AC68U firmware now contains both images in a single file.

That's a bit messy... and will cause them more work down the road with updates.

I'm in agreement with you, better to keep the releases split out, legacy vs. HND...
 

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