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Think Broadband Ping Monitor Results (POST YOURS)
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Old 05-02-2015, 21:58   #4921
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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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Old 06-02-2015, 10:57   #4922
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Re: Think Broadband Ping Monitor Results (POST YOURS)

Quote:
Originally Posted by Ignitionnet View Post
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.
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 View Post
The scheduler isn't a traffic management scheme, it doesn't really have any intelligence to speak of......
Sort of reminds you of some Technical Support Forums doesn't it? :p
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Old 06-02-2015, 19:39   #4923
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Re: Think Broadband Ping Monitor Results (POST YOURS)

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Originally Posted by horseman View Post
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"?
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 ----------

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Sort of reminds you of some Technical Support Forums doesn't it? :p
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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Old 09-02-2015, 16:57   #4924
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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?
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Old 09-02-2015, 17:50   #4925
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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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Old 12-02-2015, 15:29   #4926
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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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Old 10-03-2015, 02:37   #4927
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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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Old 11-03-2015, 00:22   #4928
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Re: Think Broadband Ping Monitor Results (POST YOURS)

Got a hump starting as well.

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Old 11-03-2015, 09:38   #4929
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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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Old 11-03-2015, 16:56   #4930
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Re: Think Broadband Ping Monitor Results (POST YOURS)

Quote:
Originally Posted by Kushan View Post
I have the same hump, still ongoing:



This one starts at 11pm though.
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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Old 11-03-2015, 18:34   #4931
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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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Old 12-03-2015, 08:34   #4932
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Re: Think Broadband Ping Monitor Results (POST YOURS)

No hump in Abingdon
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Old 12-03-2015, 16:56   #4933
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Re: Think Broadband Ping Monitor Results (POST YOURS)

Quote:
Originally Posted by qasdfdsaq View Post
There isn't a transit provider sitting between Virgin Media and Think Broadband. Not as far as I know anyway.
Presumably because NetConnex is peering directly with a number of global Tier 1 providers including LINX,LONAP, AboveNet etc :p
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Old 12-03-2015, 19:01   #4934
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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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Old 16-03-2015, 11:42   #4935
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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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