Think Broadband Ping Monitor Results (POST YOURS)
05-02-2015, 20:58
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#4921
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Nothing at all if you squint and look at the left half.
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06-02-2015, 09:57
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#4922
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cf.geek
Join Date: Dec 2003
Location: Hove East sussex
Age: 73
Posts: 574
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Quote:
Originally Posted by Ignitionnet
Two issues at play here.
1) DOCSIS upstream is TDMA which is more prone to latency caused by utilisation - there are 2 contention points at play, contending to send your request for a grant and then waiting for the grant time to actually transmit the data.
2) DOCSIS allows large traffic bursts to request more bandwidth as part of a data burst so favours continuous large amounts of upstream traffic over small bursts such as a response to a TBB ping.
Downstream uses a scheduler at the CMTS. The pipe has to max out, with interest, in order to increase latency substantially.
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Cheer Carl, Yet again I'm obliged and indebted for your patient elaboration (albeit I was personally reasonably familiar with the concept) and eagerly await your concise explanation when someone (other than me) asks "What about dual token bucket rate shaping"?
---------- Post added at 09:57 ---------- Previous post was at 09:53 ----------
Quote:
Originally Posted by Ignitionnet
The scheduler isn't a traffic management scheme, it doesn't really have any intelligence to speak of......
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Sort of reminds you of some Technical Support Forums doesn't it? :p
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06-02-2015, 18:39
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#4923
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Inactive
Join Date: Jun 2008
Location: Leeds, West Yorkshire
Age: 45
Posts: 13,996
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Quote:
Originally Posted by horseman
Cheer Carl, Yet again I'm obliged and indebted for your patient elaboration (albeit I was personally reasonably familiar with the concept) and eagerly await your concise explanation when someone (other than me) asks "What about dual token bucket rate shaping"?
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Do VM use ERBA and hence require dual token buckets on downstream? Pretty sure they don't on that score, just yet!
I guess you're referring to dual token on upstream. Easy enough - I defer to this Google site:
https://sites.google.com/site/amitsc...affic-policing
Though of course the CIR on VM's tiers is zero - dual token is more built with services like VoIP in mind where the cable modem has to implement DTB to ensure it behaves well with a UGS VoIP service flow rather than allowing buffers to be overwhelmed by high bandwidth BE service flow traffic
---------- Post added at 18:39 ---------- Previous post was at 18:38 ----------
Quote:
Originally Posted by horseman
Sort of reminds you of some Technical Support Forums doesn't it? :p
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Though at a high level I work in technical support. Don't give me any more incentive to be yet more jaded
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09-02-2015, 15:57
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#4924
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CF Resident Dog
Join Date: Mar 2005
Posts: 14,264
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Re: Think Broadband Ping Monitor Results (POST YOURS)
I am suffering from high utilisation in the evening when my download speed drops from 100mbit to 28mbit, when this happens i notice that part of my upstream power levels are different on each channel when i believe they're normally the same.
For example my current power levels are 39.75, 39.75 after a reboot which i think looks normal but last night they were reading 40.25, 41.75.
What is the significance of the numbers being different after the decimal point as i thought the reason was mentioned here by someone but i can't find the post?
__________________
PSN: Snoopzster
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09-02-2015, 16:50
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#4925
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Think Broadband Ping Monitor Results (POST YOURS)
There is no significance. Having slightly differing power levels on any channel is normal. Different frequencies experience different levels of attenuation and interference.
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12-02-2015, 14:29
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#4926
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cf.mega poster
Join Date: Sep 2008
Location: Lincoln
Age: 48
Services: 350Mb (Hub 3) | TV: 2x TiVo on XL | Phone
Posts: 1,051
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Re: Think Broadband Ping Monitor Results (POST YOURS)
I have noticed over the last few days I am getting a little bit of packet loss it appears
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10-03-2015, 01:37
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#4927
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cf.member
Join Date: Aug 2012
Services: Hub 5
VM 200MB Broadband
Posts: 58
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Re: Think Broadband Ping Monitor Results (POST YOURS)
It seems our long lost friend is back. I notice a hump across my graph that perfectly coincides with midnight and appears on a few local CMTS graphs also:
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10-03-2015, 23:22
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#4928
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cf.addict
Join Date: Jul 2010
Location: Newport, Shropshire
Posts: 338
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Got a hump starting as well.
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11-03-2015, 08:38
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#4929
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FORMER Virgin Media Staff
Join Date: Dec 2010
Location: Warrington
Posts: 4,737
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Re: Think Broadband Ping Monitor Results (POST YOURS)
I have the same hump, still ongoing:
[img]Download Failed (1)[/img]
This one starts at 11pm though.
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11-03-2015, 15:56
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#4930
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cf.member
Join Date: Oct 2007
Posts: 78
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Quote:
Originally Posted by Kushan
I have the same hump, still ongoing:
This one starts at 11pm though.
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If I had to hazard a guess, I would say Virgin Media are carrying out network maintenance… If indeed it is happening within the Virgin Media network, it could be a transit provider sitting between Virgin Media and Think Broadband.
This isn’t what we have seen previously, this isn’t a link becoming congested… Instead it looks like Virgin Media or a third party are shutting down a link, traffic is then taking an alternative route, which happens to have a higher latency.
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11-03-2015, 17:34
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#4931
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Think Broadband Ping Monitor Results (POST YOURS)
There isn't a transit provider sitting between Virgin Media and Think Broadband. Not as far as I know anyway.
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12-03-2015, 07:34
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#4932
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cf.mega poster
Join Date: Sep 2010
Location: Oxfordshire
Services: TV XL ,TiVo X 2,
200Mb Broadband
XL phone
Posts: 1,158
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Re: Think Broadband Ping Monitor Results (POST YOURS)
No hump in Abingdon
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12-03-2015, 15:56
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#4933
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cf.geek
Join Date: Dec 2003
Location: Hove East sussex
Age: 73
Posts: 574
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Quote:
Originally Posted by qasdfdsaq
There isn't a transit provider sitting between Virgin Media and Think Broadband. Not as far as I know anyway.
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Presumably because NetConnex is peering directly with a number of global Tier 1 providers including LINX,LONAP, AboveNet etc :p
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12-03-2015, 18:01
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#4934
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cf.mega poster
Join Date: Aug 2004
Posts: 11,207
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Well, whoever else NetConnex peer with is rather irrelevant given they have public peering directly with VM anyway.
And technically LINX is not a global tier 1 provider, it's an exchange that providers interconnect at. Neither is LONAP.
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16-03-2015, 10:42
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#4935
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Inactive
Join Date: Oct 2009
Location: Warwickshire
Services: XL TV, Tivo, 152Mb, Phone
Posts: 52
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Re: Think Broadband Ping Monitor Results (POST YOURS)
Getting really annoying witt this crap now.
[img]Download Failed (1)[/img]
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