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Author Topic: Modem/Router VDSL2 Technicolor DGA4130 (BCM63138)  (Read 100366 times)

bilbokitz

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Re: Modem/Router VDSL2 Technicolor DGA4130 (BCM63138)
« Reply #1140 on: July 06, 2018, 01:01:43 PM »

Snr down has just now stabilised at 4.8. Sync 181
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Alcatel Cab 200/20 Vectored VDSL - Technicolor DGA4130 Bridged + Asus RT-AC86U Asuswrt-Merlin

Lil-Koby

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Re: Modem/Router VDSL2 Technicolor DGA4130 (BCM63138)
« Reply #1141 on: July 07, 2018, 06:32:38 AM »

Something weird is going on with my snr today, yesterday it dropped down to just under 5 and stayed there and my connection speed went up. Today it appears to be all over the place.

Hey bilbokitz, for me it seems like that your ISP has configured SRA (Seamless Rate Adaptation) at your SVVDSL connection.
Imho it's definitely a sign that SRA is running if your syncrate goes up or down without a loss of the actual synchronization, but i have no experience with SRA so it's just a theory...

And just to make sure that i understand you correctly...
If your saying that your connection Speed went up are you talking about the "theoretical" max Syncrate (calculated by the modem) or the actual Syncrate which your modem is connected with ?
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DGA4130@bridge, fw 1.1.0, GUI: 7.17.3 <3
DGA4132@bridge, fw 1.1.0, GUI: 8.1.2 <3
Archer C2600@LEDE 18.06

bilbokitz

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Re: Modem/Router VDSL2 Technicolor DGA4130 (BCM63138)
« Reply #1142 on: July 07, 2018, 08:47:36 AM »

Oh right  that's  what sra is. Both actual and max attainable go up and down without resync.  :)

It actually did this before the upgrade to 35b, ever since I had this dga.
« Last Edit: July 07, 2018, 08:50:09 AM by bilbokitz »
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Alcatel Cab 200/20 Vectored VDSL - Technicolor DGA4130 Bridged + Asus RT-AC86U Asuswrt-Merlin

Skyfighter

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Re: Modem/Router VDSL2 Technicolor DGA4130 (BCM63138)
« Reply #1143 on: July 15, 2018, 11:05:47 AM »

hey all,
thanks for all the details / guides in this topic!

I've bought a DBA4132, read a lot and spend a few hours playing around, flashing firmware...but I've got some questions to verify my findings/assumptions...is someone willed to enlighten me?  :)

1) v1.0.3 is the only firmware which can be rooted in active mode (using autoflashgui), correct? (rooted & active v1.0.3 is then used to root the inactive, newer firmware like v1.1.0/v1.0.5 on the other bank)

2) Downgrading from v1.1.0 to v1.0.5/v1.0.3 is hassle-free because the autoflashgui exploit works, but whats up with newer fw? Does the exploit not work anymore or does the firmware prevent downgrading no matter if you use autoflashgui or TFTP-Recovery? (are there any other ways to flash?)

3) Following the Guide in Post/Reply #992 I got active-bank1-v1.1.0-rooted-oemgui & inactive-bank2-v1.0.3-rooted-oemgui; after installing v8.5.0 AnsuelGUI (https://github.com/Ansuel/tch-nginx-gui/tree/master/compressed) while running bank1 I got: active-bank1-v1.1.0-rooted-ansuelgui & inactive-bank2-v1.0.3-rooted-oemgui - is this the expected/desired outcome? (I thought the ansuel gui automatically installs itself to bank2, too!? Went something wrong? Should I manually install the ansuelGui on Bank2?)

4) Is the SerialConnection a way to manually root newer Firmware Versions (> v1.1.0)? Are the default passwords (of root/technician/superuser) known? (didn't search for them yet...just read somewhere that serial access is possible but for now had no look at the details)
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Lil-Koby

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Re: Modem/Router VDSL2 Technicolor DGA4130 (BCM63138)
« Reply #1144 on: July 16, 2018, 06:48:32 PM »

Oh right  that's  what sra is. Both actual and max attainable go up and down without resync.  :)

It actually did this before the upgrade to 35b, ever since I had this dga.
Well it seems like that the DGA is working quite well with SRA@VVDSL. 
In my country there is basically no ISP which activates SRA at (V)VDSL and in the main time of ADSL2+ there were only a few smallish local ISP's that went for SRA.
An to be honest i could never understand why the big ISP's here didn't go for SRA, imho a temporarily lower speed is always better than a loss of synchronization! ;)

@Skyfighter
1) Correct, afaik only 1.0.3 is rootable.
2) I'm not sure but i think newer fw's (>1.1.0, without root and mod GUI) have some kind of a downgrade lock but i can't tell you for sure as i haven't tried any firmware greater than 1.1.0.
3) Thats fine and a perfect combo ! You don't necessarily need root with firmware 1.0.3 at the backup bank.
4) No but i think the serial port can help you flash a working firmware in case that you have lost root with a firmware > 1.1.0 and/or if you have a corrupt bank1 with a non working/existing bank2.
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DGA4130@bridge, fw 1.1.0, GUI: 7.17.3 <3
DGA4132@bridge, fw 1.1.0, GUI: 8.1.2 <3
Archer C2600@LEDE 18.06
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