Packet loss on otherwise perfect FTTC line
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- Re: Packet loss on otherwise perfect FTTC line
Packet loss on otherwise perfect FTTC line
06-07-2019 10:53 AM
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Hi folks,
I'm fortunate enough to live close enough to my cabinet that I get a full 80/20 sync with very low line error rates. My line has been sync'd for nearly 50 days and current modem stats are:
Max: Upstream rate = 32054 Kbps, Downstream rate = 82364 Kbps Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 79999 Kbps Bearer: 1, Upstream rate = 0 Kbps, Downstream rate = 0 Kbps Link Power State: L0 Mode: VDSL2 Annex B VDSL2 Profile: Profile 17a TPS-TC: PTM Mode(0x0) Trellis: U:ON /D:ON Line Status: No Defect Training Status: Showtime Down Up SNR (dB): 6.1 16.5 Attn(dB): 9.0 0.0
...
Since Link time = 49 days 17 hours 2 min 45 sec FEC: 33945 301403 CRC: 0 1729 ES: 0 1583 SES: 0 0 UAS: 0 0 LOS: 0 0 LOF: 0 0 LOM: 0 0
....these are constantly updated at http://home.bobsta.com/fullstats.htm
My issue is that I've been experiencing high latency peaks and packet loss since around 4pm on Monday 1 July.
Prior to this date, my TBB graphs typically looked like this:
Or on a busy weekend with kids streaming stuff throughout the day:
Note everything is very quiet during the night. I find it slightly annoying that streaming seems to create such high maximum latency - given the amount of bandwidth we have available - and I have QoS on my UniFi ER-X router active to try to alleviate that... but the average latency is bearable and packet loss is essentially zero.
However, as from Monday 1 July this all changed. No new devices have been added to my home network, nothing has been rebooted or changed... and yet now we get this:
... packet loss present throughout the night and day - even at times when there's no-one at home / nothing going on on the network.
Right now my live graph is:
This morning I rebooted my router (and upgraded the firmware) to eliminate it as the source of the issue. It hasn't helped.
I haven't restarted the modem yet (Huawei HG612) as I don't want to introduce a resync if one isn't necessary.
Could you investigate on your side please PlusNet? This looks like some fairly serious congestion / contention somewhere.
Thanks,
Bobsta
Re: Packet loss on otherwise perfect FTTC line
06-07-2019 2:27 PM
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Quick update to say that I've now rebooted the modem and the issue is still present.
Current live quality monitoring graph: https://www.thinkbroadband.com/broadband/monitoring/quality/share/26d8cec166d92a54d00e008dd2db53223b...
Re: Packet loss on otherwise perfect FTTC line
06-07-2019 10:04 PM
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Hi @Bobsta, thanks for getting in touch.
I've tested the line and this hasn't detected any issues, we are also seeing a stable connection and your VLAN is 'green' and showing no signs of congestion.
Could you please confirm if this is being seen via a wired or wireless connection? If wireless, could you please test a wired connection to see if you see the same results?
Re: Packet loss on otherwise perfect FTTC line
07-07-2019 8:45 AM
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Hi LaurenB,
Thanks for checking. But no wireless in use here. These tests are externally pinging my router.
Any tests I’ve run within my network I’m sure to always use a directly GigE connected machine. Right now ping speeds are looking pretty stable and consistent - but during busy periods this week I’ve suffered horrible jitter when working from home and doing Zoom calls.
I guess I can disconnect my router for a few hours to try to pick up a new IP address on a different gateway. But to be honest I shouldn’t have to do that.
Thanks,
Bobsta
Re: Packet loss on otherwise perfect FTTC line
07-07-2019 7:29 PM
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Hello @Bobsta,
Thank you for getting back to us confirming the requested details and for the issue you are experiencing. Can advise if you are using a VPN to complete work from home and your zoom calls?
If you are not then please can you provide a trace route when these issues are happening so that we can see what is happening to the connection during that time.
Re: Packet loss on otherwise perfect FTTC line
07-07-2019 10:14 PM
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Hi Sammy,
OK, thanks, if I experience it again I'll run some traceroutes. Are there any particular IPs you'd like me to hit?
Earlier today I determined I was connected to your psb-ir01 gateway which I understand others have also had issues with. I took my router down for a few hours and on restart picked up a completely different subnet and gateway, and everything seems fine. Long may it continue!
Thanks,
Bobsta
Re: Packet loss on otherwise perfect FTTC line
08-07-2019 10:53 AM
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Hi @Bobsta,
I'm glad to hear that your connection is looking better after you turned your router off for a while. Please don't hesitate to get back in touch if you experience any further connection issues. If you need to do a traceroute, we'd recommend trying a high traffic site, such as bbc.co.uk
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