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Peak time latency spikes

Community Gaffer
Community Gaffer
Posts: 17,644
Thanks: 636
Fixes: 162
Registered: 05-04-2007

Peak time latency spikes

Some of you will be aware that we've been seeing some latency spikes and performance problems for a couple of hours in the evening over the past week. These issues are centered around those customers that are connected on the gateways that start with PCL, you can see which gateway you're connected to here: http://usertools.plus.net/@gateway
We've been working with our hardware vendors to diagnose and resolve this problem and have been gathering data over recent days to help get to the bottom of the issue and resolve it once and for all.
If you do experience a spike in your latency, or start to see sluggish browsing or streaming problems and are connected to a PCL gateway then we'd suggest logging in to your router, disconnect and reconnecting until you are on a gateway that doesn't start with PCL.
If this post resolved your issue please click the 'This fixed my problem' button
 Chris Parr
 Plusnet Staff
1,456 REPLIES
Community Gaffer
Community Gaffer
Posts: 5,101
Thanks: 426
Fixes: 5
Registered: 04-04-2007

Re: Peak time latency spikes

Hi guys,
Quick update for you.  We'll be running a debug session tonight to gather a bit more information.  It will affect customers on PCL-AG01 and PCL-AG02 but shouldn't be apparent for more than 30 minutes.  Symptoms of this will be the latency spikes and slower than normal speeds you've been seeing over the last week.  
If you are affected, feel free to disconnect and reconnect to connect to a different gateway.
Kelly Dorset
Broadband Service Manager
Blim
Grafter
Posts: 462
Registered: 06-03-2012

Re: Peak time latency spikes

Thanks guys  Smiley
St3
Aspiring Champion
Posts: 2,580
Thanks: 461
Fixes: 4
Registered: 13-07-2012

Re: Peak time latency spikes

ive just had pings of 300 again and had to jump gatewys. Im on ptw-ag04 now and pings have gone back to normal ill see how this goes.
Oxslow
Grafter
Posts: 53
Registered: 09-08-2007

Re: Peak time latency spikes

I am on ptw-ag01 my ping 160ms+ where it is normally 30ms. I am going to try to reconnect the router.
Community Gaffer
Community Gaffer
Posts: 5,101
Thanks: 426
Fixes: 5
Registered: 04-04-2007

Re: Peak time latency spikes

Yep.  We've got the problem again tonight.  Disconnect and reconnect to try and get off the affected gateways.
Kelly Dorset
Broadband Service Manager
shuffle
Dabbler
Posts: 16
Registered: 02-12-2011

Re: Peak time latency spikes

Quote from: Oxslow
I am on ptw-ag01 my ping 160ms+ where it is normally 30ms. I am going to try to reconnect the router.

Exactly the same for me, I upgraded from Unlimited from Value fibre and dropped the Pro Add on so, I hope its not because of that.
Community Gaffer
Community Gaffer
Posts: 5,101
Thanks: 426
Fixes: 5
Registered: 04-04-2007

Re: Peak time latency spikes

No, not to do with that.  It's a general issue.    Embarrassed
Kelly Dorset
Broadband Service Manager
shuffle
Dabbler
Posts: 16
Registered: 02-12-2011

Re: Peak time latency spikes

ok thanks Kelly.
yes pings around 150 at the mo, normally its 30
Community Veteran
Posts: 19,100
Thanks: 437
Fixes: 21
Registered: 31-08-2007

Re: Peak time latency spikes

Ouch, just done a few cmd prompt pings
Pinging ntp.plus.net [212.159.6.10] with 32 bytes of data:
Reply from 212.159.6.10: bytes=32 time=141ms TTL=246
Reply from 212.159.6.10: bytes=32 time=155ms TTL=246
Reply from 212.159.6.10: bytes=32 time=154ms TTL=246
Reply from 212.159.6.10: bytes=32 time=157ms TTL=246
Ping statistics for 212.159.6.10:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 141ms, Maximum = 157ms, Average = 151ms
Normally circa 39/40mS on pcl-ag04 (20CN).
shuffle
Dabbler
Posts: 16
Registered: 02-12-2011

Re: Peak time latency spikes

I just logged into router as recommended by someone on this forums, disconnected, then reconnect, lower ping now.
MsDizzie
Grafter
Posts: 132
Registered: 21-11-2012

Re: Peak time latency spikes

Kelly I know you are working on PCL-AG01 and PCL-AG02 this evening, but Chris did mention PCL as a whole (I'm currently on PCL-AG07 [21CN]), and the ping graphs have looked very similar over the last 2 nights
Monday:

Tuesday:
Superuser
Superuser
Posts: 9,457
Thanks: 798
Fixes: 52
Registered: 06-04-2007

Re: Peak time latency spikes

On pcl-ag07 (21CN), outgoing pings are normal
Ping statistics for 212.159.6.9:
    Packets: Sent = 25, Received = 25, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 29ms, Maximum = 34ms, Average = 30ms
but the ping monitor (incoming) shows minimum 30ms, average around 35ms, peak 60ms, very similar to MsDizzie.
David
Community Gaffer
Community Gaffer
Posts: 5,101
Thanks: 426
Fixes: 5
Registered: 04-04-2007

Re: Peak time latency spikes

I believe those small lifts you are seeing are due to more general business because of the iOS update release and because we are lighting some more bandwidth next week.
Kelly Dorset
Broadband Service Manager
Community Veteran
Posts: 19,100
Thanks: 437
Fixes: 21
Registered: 31-08-2007

Re: Peak time latency spikes

Seems pretty much back to normal here at the moment, pcl-ag04 20CN
Pinging ntp.plus.net [212.159.6.10] with 32 bytes of data:
Reply from 212.159.6.10: bytes=32 time=39ms TTL=246
Reply from 212.159.6.10: bytes=32 time=40ms TTL=246
Reply from 212.159.6.10: bytes=32 time=38ms TTL=246
Reply from 212.159.6.10: bytes=32 time=38ms TTL=246
Ping statistics for 212.159.6.10:
   Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
   Minimum = 38ms, Maximum = 40ms, Average = 38ms