This topic

UAS errors

tonyw1 — Thu, 30 Sep 2021 13:30:28 GMT

Hi, does anyone know what UAS errors are?

These are my modem stats which look quite good except for the UAS. Is that 35 seconds down time?

Would these stats be regarded as normal?

============================================================================
VDSL Training Status: Showtime
Mode: VDSL2 Annex B
VDSL Profile: Profile 17a
G.Vector: Disable
Traffic Type: PTM Mode
Link Uptime: 1 day: 22 hours: 26 minutes
============================================================================
VDSL Port Details Upstream Downstream
Line Rate: 19.999 Mbps 77.393 Mbps
Actual Net Data Rate: 20.000 Mbps 77.394 Mbps
Trellis Coding: ON ON
SNR Margin: 9.1 dB 3.5 dB
Actual Delay: 0 ms 0 ms
Transmit Power: 6.7 dBm 12.8 dBm
Receive Power: -11.6 dBm -3.4 dBm
Actual INP: 47.0 symbols 52.0 symbols
Total Attenuation: 18.3 dB 16.2 dB
Attainable Net Data Rate: 25.222 Mbps 79.851 Mbps
============================================================================
VDSL Band Status U0 U1 U2 U3 D1 D2 D3
Line Attenuation(dB): 6.8 20.5 29.8 N/A 9.8 21.9 31.5
Signal Attenuation(dB): 6.8 19.9 28.8 N/A 13.0 21.8 31.5
SNR Margin(dB): 8.9 9.1 9.1 N/A 3.5 3.5 3.5
Transmit Power(dBm):- 5.2 -23.2 6.4 N/A 9.1 7.8 7.0
============================================================================

VDSL Counters

Downstream Upstream
Since Link time = 26 min 1 sec
FEC: 29375636 74371
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Latest 15 minutes time = 11 min 37 sec
FEC: 1274 53
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Previous 15 minutes time = 15 min 0 sec
FEC: 1535 30
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: N/A
HostInitRetr: N/A
FailedRetr: N/A
Latest 1 day time = 22 hours 26 min 37 sec
FEC: 8765373 37843
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 0 0
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Previous 1 day time = 24 hours 0 sec
FEC: 20610263 36528
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 35 35
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
Total time = 1 days 22 hours 26 min 37 sec
FEC: 29375636 74371
CRC: 0 0
ES: 0 0
SES: 0 0
UAS: 35 35
LOS: 0 0
LOF: 0 0
LOM: 0 0
Retr: 0
HostInitRetr: 0
FailedRetr: 0
============================================================================

Re: UAS errors

licquorice — Thu, 30 Sep 2021 13:32:58 GMT

UAS is unavailable seconds, ie down. You just had a 35 second line break, but otherwise stats look really good.

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 14:54:31 GMT

Thanks, so the modem looks good, (Zyxel DSL modem/router).

I have an Ipv6 problem with the Zyxel, but I can use it in bridge mode to feed into the WAN port of a FTTP Smart Hub 2 which should sort out the Ipv6 issue and having an external modem should stop BT telling the SH2 to reboot..... hopefully.

Re: UAS errors

licquorice — Thu, 30 Sep 2021 15:17:38 GMT

Yes, modem looks fine. All Smart Hub 2s with the latest firmware are now capable of configuring LAN port 4 as a WAN port, you don't need the specific red port FTTP version any longer.

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 15:29:17 GMT

Now that's something that tech support didn't tell me. I'll power it up and take a look.

Re: UAS errors

licquorice — Thu, 30 Sep 2021 15:37:08 GMT

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 15:49:28 GMT

Yup, I have the latest firmware, SH2 rebooting now in FTTP mode.

Re: UAS errors

licquorice — Thu, 30 Sep 2021 16:00:44 GMT

It works, I've tried it with an HG612 modem.

Unfortunately having a modem won't stop BT re-booting the hub if they feel the need though.

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 16:46:34 GMT

Even if it's not a BT modem?

Someone did say on another thread that he stopped getting the reboots when he got FTTP.

Maybe I'll have to ditch BT after all, my contract ends in 2 weeks and the reboots are doing my head in.

Re: UAS errors

licquorice — Thu, 30 Sep 2021 17:12:21 GMT

Any modem will be transparent to any commands sent to the hub. Can you not just use the Zyxel as a modem/ router and bin the hub.

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 17:21:05 GMT

No, because I can't get Ipv6 working on the Zyxel, which seems to be a problem with 3rd party routers in general.

Perhaps a Tp-Link VR 600 v2 would do the job some have got that working with IPv6, I think it has the same Broadcom chipset as the Zyxel, but the v3 uses a Mediatech.... or does it.... so much conflicting information.

Re: UAS errors

licquorice — Thu, 30 Sep 2021 17:24:32 GMT

Hmm, not sure why IPv6 is so important at the moment, there are extremely few IPv6 only sites.

Have you asked on the Kitz forum about configuring IPv6, there are a lot of Zyxel users on there?

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 17:26:31 GMT

At the moment I have the Zyxel in router mode with wifi off feeding a whole home premium mesh system which works really well, until BT reboot the hub. Previously I had complete wifi but had to ditch that because it kept switching the backhaul to 2.4ghz and the throughput dropped to 1mbps until I did a power off reset. So many annoying and expensive problems.

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 17:31:26 GMT

My problem is that I'm a perfectionist and like things to work properly. Kitz posters can mostly not get Zyxels working with BT, something about preceding characters and BTs implementation of Ipv6, hence wanting to stick with BT router.

Re: UAS errors

tonyw1 — Thu, 30 Sep 2021 22:50:09 GMT

Unfortunately, the SH2 won't play ball with the Zyxel in bridge mode. Maybe it's locked to BT modems?

I'll buy a S/H HG612 off ebay and try that. If that's not successful I'll have to get a 3rd party modem/router and hope for the best with Ipv6.

Thanks for your help.

Re: UAS errors

licquorice — Fri, 01 Oct 2021 07:16:02 GMT

Are you sure you have configured the Zyxel correctly, the SH2 doesn't care what modem you use. Did you set the vlan ID to 101 on the Zyxel.

Re: UAS errors

tonyw1 — Fri, 01 Oct 2021 07:37:31 GMT

802.1p set to 0 and 802.1q set to 101 on the Zyxel.

I had it working in bridge mode with a TP-Link TL-WR841N, it worked but IPv6 was intermittent so I had to return it. IPv6 works fine on the SH2 when using it's own modem.

Maybe I'm missing something on the SH2 but I factory reset, changed to FTTP, connected port 4 to port 1 on the Zyxel and it went orange and stayed there. There was no option to set MTU etc which was on the TP-Link.

Re: UAS errors

licquorice — Fri, 01 Oct 2021 07:47:35 GMT

That's weird, the SH2 should be agnostic to modem used. Unfortunately I have only tried it with an HG 612 so can't put hand on heart to say it definitely will work with any modem but I can't see how it doesn't, there's nothing special about the HG612

Re: UAS errors

tonyw1 — Fri, 01 Oct 2021 07:54:06 GMT

3rd party router suggestion (BT) (kitz.co.uk)

From the above, it looks like a TP-Link VR600 v2 (not the v3 AKA AC2100) may be the answer, what do you think?

Re: UAS errors

licquorice — Fri, 01 Oct 2021 08:12:09 GMT

Yes, TP Link seem to have sorted IPv6 with that model although they never did with the 9980 that I used to use.