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asus dsl-ac68-u help please

HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

asus dsl-ac68-u help please

Can any of the care team please look into why im getting disconnected after buying this all in one modem router? we game a fair bit so decided to splash out on a expensive piece of kit.  we get disconnects often , dsl light goes down , and there is a constant yellow 'instable connection' exclamation mark in the routers dashboard.  i used the correct user id and password , it the same both wireless and wired , works for a while then bombs us off ! i shall be on the phone with asus asap and would like some stats / info to throw at them , as its a bit expensive to just bin it. my plusnet account is haydnexportnew.
21 REPLIES
Community Veteran
Posts: 1,612
Thanks: 22
Registered: 29-06-2010

Re: asus dsl-ac68-u help please

I've just found these posts on the BT Forum which may help:
Quote
try these settings
Stability Adjustment (VDSL): disabled
Tx Power Control (VDSL): disabled
Rx AGC GAIN Adjustment (VDSL): stable
UPBO - upstream power back off (VDSL): enabled
SRA (Seamless Rate Adaptation): enabled
Bitswap: disabled
VDSL Profile: 17a
Improved Impulse Noise Protection (G.998.4): enabled

Quote
I see talk in another forum that it is the bitswap option that causes the instability. Turning this off stablises the line.
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

thanks for the speedy reply ! Can you give me a link to these posts?
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

i tried that no joy, checked log this morning to see this....
ct 30 06:51:01 WAN Connection: Ethernet link down.
Oct 30 06:51:01 stop_nat_rules: apply the redirect_rules!
Oct 30 06:51:32 WAN Connection: WAN was restored.
Oct 30 06:51:32 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_vlan100)!
Oct 30 06:53:57 WAN Connection: Ethernet link down.
Oct 30 06:53:57 stop_nat_rules: apply the redirect_rules!
Oct 30 06:54:44 WAN Connection: WAN was restored.
Oct 30 06:54:44 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_vlan100)!
Oct 30 06:56:19 WAN Connection: Ethernet link down.
Oct 30 06:56:19 stop_nat_rules: apply the redirect_rules!
Oct 30 06:56:46 WAN Connection: WAN was restored.
Oct 30 06:56:46 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_vlan100)!
Oct 30 07:34:59 WAN Connection: Ethernet link down.
Oct 30 07:34:59 stop_nat_rules: apply the redirect_rules!
Oct 30 07:35:45 WAN Connection: WAN was restored.
Oct 30 07:35:45 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_vlan100)!
Oct 30 08:02:21 WAN Connection: Ethernet link down.
Oct 30 08:02:21 stop_nat_rules: apply the redirect_rules!
Oct 30 08:02:56 WAN Connection: WAN was restored.
Oct 30 08:02:56 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_vlan100)!
Oct 30 08:12:47 rc_service: httpd 562:notify_rc restart_DSLsendmail
Oct 30 08:29:49 rc_service: httpd 562
Please can someone help ?
pwatson
Rising Star
Posts: 2,468
Thanks: 8
Fixes: 1
Registered: 26-11-2012

Re: asus dsl-ac68-u help please

The first thing I'd try is putting the BTO modem back on the line with your old router and see if you still get the drops.
If you do, report the line fault and get it fixed before trying the Asus again. If you don't then take it up with Asus.
Plusnet only officially support the router they supply (though they do try to help with others). They are unlikely to be able to report a line fault if you're not using the modem provided as part of the service.
Community Veteran
Posts: 6,824
Thanks: 1
Registered: 27-10-2012

Re: asus dsl-ac68-u help please

Be careful with the Asus.
You'll end up causing DLM to intervene if you have too many disconnects in a 24 hour period.
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

its not dropping sync just the session , so i think it must be router side of things but i have no idea what to change .  I have redone setup with bt infinity 2 settings instead of the plusnet fibre one in the asus menu and its looking a bit better.
redbull2k14
Grafter
Posts: 160
Thanks: 1
Registered: 29-01-2014

Re: asus dsl-ac68-u help please

what seems to work for me is to manually drop the session for 10 minutes then reconnect. In router gui its the green double monitor/computer icon below the language setting, click it and it will allow you to drop the session.
If im right you get a high amount of CRC error. by doing the above i have only had 5 CRC in 2 days of uptime
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

just had another drop , first since 8:30 ish this morning
ct 30 11:07:25 kernel: br0: received packet on eth2 with own address as source address
Oct 30 11:30:36 WAN Connection: Ethernet link down.
Oct 30 11:30:36 stop_nat_rules: apply the redirect_rules!
Oct 30 11:31:12 WAN Connection: WAN was restored.
Oct 30 11:31:12 start_nat_rules: apply the nat_rules(/tmp/nat_rules_ppp0_vlan100)!
carlmagic
Grafter
Posts: 55
Registered: 29-10-2014

Re: asus dsl-ac68-u help please

http://forums.overclockers.co.uk/showthread.php?t=18606945
That thread has lots of people with problems and things try too Smiley
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

hi , thanks.  I think i have found the problem , ive set the vdsl to 17a instead of 30a and its been solid since.  Cross fingers ! Cool
Community Veteran
Posts: 6,419
Thanks: 531
Fixes: 48
Registered: 30-07-2007

Re: asus dsl-ac68-u help please

Yes, BT haven't implemented the 30a profile yet ( if ever! ). You would have thought it ( the ASUS ) would negotiate down to something that was supported, maybe VDSL doesn't do that ( unlike ADSL )
Community Veteran
Posts: 1,412
Thanks: 4
Registered: 29-01-2009

Re: asus dsl-ac68-u help please

The fault seems connected to the log message "WAN Connection: Ethernet link down."
Yet this is an all-in-one device, so the WAN isn't an Ethernet link... At least not one that exists outside the box.
The OP observed that the fault didn't cause a resync, just the loss of the PPP session. If true, it would seem strange that a config shift between 17a and 30a would solve the problem; if the modem portion thought there was a problem related to the 17a profile vs 30a profile, then it would surely resync!
Sounds like the Asus isn't quite ready for the primetime...
Plusnet Customer
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

Asus emailed me a beta firmware that fixed the issue.  I have rebooted a few times to check all was well, and i cant seem to sync above 39999kbps , have i been banded or something?
HaydnExport
Grafter
Posts: 567
Registered: 23-10-2009

Re: asus dsl-ac68-u help please

i have attached the bt wholesale test results and i have been set a 38mb profile.  Can i have this removed asap please as im paying for the up to 80mb package !