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Slow ADSL CQM: Difference between revisions

Slow ADSL CQM (view source)

Revision as of 10:45, 10 March 2015

302 bytes added ,  10 March 2015
m
→‎Lots of traffic on the line
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Here is an example of a CQM Graph with lots of upload traffic,
 
[[File:CQM1CQM-FTTC-upload.png|none|frame|Lots of upload atin the endmorning of- a backup without any traffic shaping on the dayclient end]]
 
The example above show a line with occasional short uploads causing spikes in peak latency, and then a sustained upload starting at around 6pm and causing high latency (queue in the router). At 8pm there was more upload filling the link causing higher latency still and some loss (normal when the link is full). This is normal.It may cause the line to be slow. If you don't know what the traffic is, then you can do a [[Traffic Capture]] or ask Support to Help.
 
This line is doing a large backup from just before 6am. The dark red horizontal line shows the traffic, during this time there is lots of packet loss (red) and the light blue at the bottom is showing high latency. So, whilst the backup is happening the line has about 50% packet loss and around 300ms of latency. Using the line for things like web browsing at this time will be slow and sluggish. However, this is not a fault per-se. It is normal for a line to appear slow when it's being filled with traffic. However, this traffic may be unknown, it may not be a backup, but could be a virus or peer-to-peer traffic. You can do a [[Traffic Capture]] to see what the traffic is, or ask Support to Help.
 
==Sync rate has been capped or lowered==
AA-Andrew
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