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Packet loss on modem only

Davnell
Joining in

Good day all!

Having recently moved into a new property I have found myself setting up a mesh system in order to get adequate wireless coverage throughout, in order to do this I set my SuperHup 3.0 into modem only mode and configured the Netgear Orbi and we were good to go!

After a week or so I noticed frame drop whilst streaming and found that I was getting around 10% packet loss on the connection, it had been fine up until then (yesterday). I made a few calls to the customer support team and after a few "magic signals" which did nothing, I was advised to try a pinhole reset on the hub. Despite my doubts, this actually seemed to fix the problem, however as soon as I go back to modem mode it starts dropping again.

I have removed the Orbi from the setup and wired my desktop directly to the hub, I then switched to router mode and all is well, back to modem mode with just my PC connected and we have packet loss again.

Anyone have any idea what might be doing it, other than a VM fault of some kind? The latest advice from VM Customer Support is it is "a short term connectivity issue" which will be resolved "within 24h or more", but I am not holding my breath since that means absolutely nothing, so thought I would post here as well.

Cheers

Davnell
34 REPLIES 34

So I just had another massive spike, so it seems like it's still having problems:

 

https://www.thinkbroadband.com/broadband/monitoring/quality/share/cedf2051110d5bb07c1c5822641e06e68b6674e0
Davnell

So I just took another look at my graph, looks like it's still had loss overnight too when nothing is in use in the house. Pretty sure this shows that is not a device on the network causing it, especially combined with the fact that on router mode, with the same devices, everything works fine.

Any ideas?

Davnell

-tony-
Alessandro Volta

that says to me - and i may well be wrong the problem is external - check all the coax connections are more than finger tight - i had similar - well much worse on the dropped packets - turned out to be a connection in the omnibox - seemed tight but a further nip with a spanner and the red curtail immediately disappeared

certainly check any internal connections

logically it cannot be that with the difference in modem/router mode but stranger things have happened on BB connections

____________________

Tony.
Sacked VIP

Thanks Tony,

 

I took a spanner to the connection on the Hub and the one to the wall, still getting loss.

It does seem to be much better since the massive blip last night, but the problem is still there 😞 I am really at a loss as to what to do next, I think I will pop it back to router mode and re-test, though I have done this multiple times already and observe the same issues:

Switch to router mode with PC as only wired connection and all wireless devices identical to now = everything fine

Switch to modem mode with just PC connected OR connected to Orbi with same wireless devices and PC connected to Orbi = loss

 

Also the improvement from after the massive spike last night seems to have gone away as well, much worse again now, though still better than the original amount.

Davnell

legacy1
Alessandro Volta
go back to router mode and post the Downstream bonded channels and Upstream bonded channels.
---------------------------------------------------------------

ROUTER MODE STATS

 

Downstream bonded channels
Channel Frequency (Hz) Power (dBmV) SNR (dB) Modulation Channel ID
1 402750000 5.1 40 256 qam 30
2 202750000 6 40 256 qam 9
3 210750000 6.1 40 256 qam 10
4 218750000 6 40 256 qam 11
5 226750000 6 40 256 qam 12
6 234750000 6 40 256 qam 13
7 242750000 6 40 256 qam 14
8 250750000 5.9 40 256 qam 15
9 258750000 5.6 40 256 qam 16
10 266750000 5.6 40 256 qam 17
11 274750000 5.6 40 256 qam 18
12 282750000 5.6 40 256 qam 19
13 290750000 5.5 40 256 qam 20
14 298750000 5.9 40 256 qam 21
15 306750000 5.9 40 256 qam 22
16 314750000 5.6 40 256 qam 23
17 322750000 5.8 40 256 qam 24
18 330750000 6 40 256 qam 25
19 370750000 5.8 40 256 qam 26
20 378750000 5.6 40 256 qam 27
21 386750000 5.5 40 256 qam 28
22 394750000 5.4 40 256 qam 29
23 410750000 5.3 40 256 qam 31
24 418750000 5.3 40 256 qam 32

 

Downstream bonded channels
Channel Locked Status RxMER (dB) Pre RS Errors Post RS Errors
1 Locked 40.3 17 0
2 Locked 40.3 8 0
3 Locked 40.3 18 0
4 Locked 40.3 15 0
5 Locked 40.9 8 0
6 Locked 40.3 14 0
7 Locked 40.3 8 0
8 Locked 40.3 10 0
9 Locked 40.3 20 0
10 Locked 40.3 21 0
11 Locked 40.9 10 0
12 Locked 40.9 22 0
13 Locked 40.9 16 0
14 Locked 40.3 35 0
15 Locked 40.3 27 0
16 Locked 40.3 25 0
17 Locked 40.3 39 0
18 Locked 40.3 5 0
19 Locked 40.9 17 0
20 Locked 40.3 15 0
21 Locked 40.3 11 0
22 Locked 40.3 16 0
23 Locked 40.3 10 0
24 Locked 40.3 23 0


Upstream bonded channels
Channel Frequency (Hz) Power (dBmV) Symbol Rate (ksps) Modulation Channel ID
1 39400000 39.8 5120 64 qam 4
2 46200000 40 5120 64 qam 3
3 32599980 38.8 5120 64 qam 5
4 25800015 38 5120 64 qam 6

 

Upstream bonded channels
Channel Channel Type T1 Timeouts T2 Timeouts T3 Timeouts T4 Timeouts
1 ATDMA 0 0 0 0
2 ATDMA 0 0 0 0
3 ATDMA 0 0 0 0
4 ATDMA 0 0 0 0

 

Davnell

and here is the graph for Router mode, obviously only valid from when I switched back a few moments ago

 

https://www.thinkbroadband.com/broadband/monitoring/quality/share/045d1f4760de7b9f3883dfae6110e0f65f27806e
Davnell


@-tony- wrote:

logically it cannot be that with the difference in modem/router mode but stranger things have happened on BB connections


You would think so and yet all of my testing shows that this is the cause. I am now back on router mode and all is well, previously I have run modem mode straight to this (wired) PC and I still get loss, so that rules out the Orbi imo. There is also the fact that there has been several changes to the amount of loss following large spikes of loss, which to me implies that something is happening in VM land since there is no change to usage on the network when this happens.

I am not an expert in what happens in VM land when you change to modem only mode, but something is not happy 😞

Not sure I have posted my MTR results on here before, but currently no drops on there because I am in router mode, when I am on modem mode the drops occur between me and:

|bagu-core-2a-xe-710-0.network.virginmedia.net - 0 | 2510 | 2510 | 8 | 11 | 45 | 10 |

Which best I can tell is my nearest VM core node.

Davnell

-tony-
Alessandro Volta

i really have no idea what if any difference you would see on a bqm running it in router to modem mode and i think [with respect] staff here would also not know

there are certainly differences as you show - is that normal or is it your hub that is different/faulty

without reading back i assume you have done a full reset of the hub - if not then do tha as i think that would be suggested by staff

after that if that does nothing then i think 2 things [maybe] need to happen

you need an answer if what you are seeing is expected and normal - if it is then i have no idea what to suggest - if it is not i think VM need to change the hub t totally rule that out as the problem

will flag the thread and see if we can get some input from VM

____________________

Tony.
Sacked VIP


@-tony- wrote:

without reading back i assume you have done a full reset of the hub - if not then do tha as i think that would be suggested by staff

 


Just to confirm - Yes I have, that was when I 1st discovered that router mode worked fine as it reset it back to router mode with default config. I then configured in router mode with my own settings and it was fine, switched to modem mode and it dropped. Have done tests as follows a couple of days ago:

Reset hub to router mode defaults = fine

Custom settings on router mode = fine

Same wire direct from hub to my PC, switched to modem mode = loss

Hopefully some of the staff will have a suggestion, as I really don't know what to try next.

Davnell