Superhub : what causes this?

[Blairhoyle]

these thin red lines are outages and it cuts my internet off for a few minutes.

I was watching IPlayer and then I had the yellow X pop on my internet connection icon at the bottom right hand corner of my screen.

I quickly checked all the lights on the hub and all went off expect for the traffic light which was flashing green and then everything came back to normal.

looking at my graph this has been the 4th issues today, there was some issues yesterday but I have went weeks without similar issues.

is there a fault on the line or they working on something?!

Can't get my head around it.

[AbyssUnderground]

Sounds like your modem lost sync and reconnected again. You should check your signal levels.

[Blairhoyle]

Lock Status Channel ID Frequency Modulation Rx Power SNR Pre RS Errors Post RS Errors
Locked 50 299000000 Hz QAM256 0.5 dBmV 37.7 dB 3049 526
Locked 49 291000000 Hz QAM256 0.2 dBmV 37.5 dB 15448 242
Locked 53 307000000 Hz QAM256 -0.8 dBmV 36.9 dB 12676 589
Locked 54 315000000 Hz QAM256 0.1 dBmV 37.3 dB 24188 651
Locked 55 323000000 Hz QAM256 0.3 dBmV 37.8 dB 1365 585
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown
Unlocked Unknown 0 Hz Unknown 0.0 dBmV 0.0 dB Unknown Unknown

---------- Post added at 21:02 ---------- Previous post was at 21:01 ----------

Upstream Channels Lock Status Channel ID Frequency Modulation Tx Power Mode Channel Bandwidth Symbol Rate
Locked 4 35800000 Hz ATDMA 42.5 dBmV 16QAM 6400000 20480 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec
Unlocked 0 0 Hz Unknown 0.0 dBmV Unknown Unknown 0 Kbits/sec

---------- Post added at 21:03 ---------- Previous post was at 21:02 ----------

Originally Posted by AbyssUnderground

Sounds like your modem lost sync and reconnected again. You should check your signal levels.

but its a random thing.

It can go weeks without this actually happening.

---------- Post added at 21:12 ---------- Previous post was at 21:03 ----------

this is from the 31st October, probably the worst I've had.



---------- Post added at 21:14 ---------- Previous post was at 21:12 ----------

23rd October



---------- Post added at 21:18 ---------- Previous post was at 21:14 ----------

anyone advise me how to sort this issue?

[babis3g]

the power levels looks fine to me
the only you can do at your end is to check at splitters and behind modem if the coax cable connections are firmly tide
also check at your modem router status >> network log ....if you have any T3 & T4 time outs

[Blairhoyle]

Originally Posted by babis3g

the power levels looks fine to me
the only you can do at your end is to check at splitters and behind modem if the coax cable connections are firmly tide
also check at your modem router status >> network log ....if you have any T3 & T4 time outs

06/11/2012 19:45:01 2436694078 TOD established
27/10/2012 18:58:46 82000500 Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=4c:60:de:1c:c1:60;CMTS-MAC=00:21:d8:d1:8c:43;CM-QOS=1.1;CM-VER=3.0;
21/10/2012 17:21:41 2436694077 TOD server unavailable
21/10/2012 17:21:41 2436694080 TOD resynchronisation failure
Time Not Established Time Not Established 68000300 DHCP WARNING - Non-critical field invalid in response ;CM-MAC=4c:60:de:1c:c1:60;CMTS-MAC=00:21:d8:d1:8c:43;CM-QOS=1.0;CM-VER=3.0;
Time Not Established Time Not Established 82000200 No Ranging Response received - T3 time-out;CM-MAC=4c:60:de:1c:c1:60;CMTS-MAC=00:21:d8:d1:8c:43;CM-QOS=1.0;CM-VER=3.0;

[Blairhoyle]

2 more today.

[Sephiroth]

Does this happen in modem mode? It might be difficult for you to chack if you don't have a router or need to connect more than one device; but the SH is not a stable device in router mode.

That said, is your upstream power stable at 42.5 or does it move upwards toward 55 dBmv? Because that owuld explain what you are seeing. Upstream impairment.

[Blairhoyle]

Originally Posted by Sephiroth

Does this happen in modem mode? It might be difficult for you to chack if you don't have a router or need to connect more than one device; but the SH is not a stable device in router mode.

That said, is your upstream power stable at 42.5 or does it move upwards toward 55 dBmv? Because that owuld explain what you are seeing. Upstream impairment.

I really don't know mate you are talking above my knowledge on IT matters.

I dont have it in modem mode no.

had another wee short outage again at 2am this morning

[Sephiroth]

I'm saying that you should confirm your upstream power level is stable.

Also I'm suggesting you try modem mode (if upstream power is stable) to see if it's the famous SH instability in router mode that you are suffering.

[qasdfdsaq]

Originally Posted by Blairhoyle

I really don't know mate you are talking above my knowledge on IT matters.

I dont have it in modem mode no.

had another wee short outage again at 2am this morning

Basically what he's saying is to keep checking the same page you got the power levels from you posted above and see if there are any big fluctuations.

[Blairhoyle]

Originally Posted by Sephiroth

I'm saying that you should confirm your upstream power level is stable.

Also I'm suggesting you try modem mode (if upstream power is stable) to see if it's the famous SH instability in router mode that you are suffering.

Originally Posted by qasdfdsaq

Basically what he's saying is to keep checking the same page you got the power levels from you posted above and see if there are any big fluctuations.

cheers but I don't really know what these power levels are meant to be. I'm at work at the minute so can't check the levels just now.

I'm not really all that confident about mucking around with Hub and changing settings.

As I said this appears to be something new that has cropped up. Had another 2 this morning/early afternoon

as poster above did say my power levels looked fine.

[Darkstar2008]

You aren't the only one suffering these spikes. I started getting these recently and they are really annoying.

I'm in the lincoln area. Where are you?

[Darkstar2008]

Damn, graph didn't show.

[horseman]

Certainly on legacy SACM I used to see these packet loss spikes correlate with UCD's in event log. Have a check to see if your upstream modulation is changing or your u/s channel frequency? Post your Network logs and "tick counters".

[Sephiroth]

Yes, what The Horse says = upstream noise