• 16.26K
  • 710
  • 1.6K
Alessandro Volta
Message 1 of 2
Flag for a moderator

Are we sure that Docsis don't do line calibration?

So long story short I changed my MAC then changed it back (due to VM new DHCP setup that may never get looked in to) and found it added a bit of latency.

When the MAC was change back when I changed it.

When I changed the MAC

and now todays just after 8:30PM to latency goes lower

Looking at hrping with timestamps the extra jitter was downstream.

0 Kudos
  • 6.96K
  • 1.21K
  • 3.04K
Very Insightful Person
Very Insightful Person
Message 2 of 2
Flag for a moderator

Re: Are we sure that Docsis don't do line calibration?

I've noticed this strange low level "wide bar chart" latency on my own connection earlier this year, and it appeared to be coincident with the area being upgraded to D3.1.  I've since noticed it appearing temporarily on some other user's BQM (sorry can't find any examples now), and I wonder if the two things are related?  

In my case this went on for (as I recall) about ten days and then things reverted back to the normal latency performance I get on my connection (see below).  That is for a Hub 3 in a D3.1 enabled area, running in modem mode with a Deco M4 mesh as router:

My Broadband Ping - VM number 2

I'm a Very Insightful Person, I'm here to share knowledge, I don't work for Virgin Media. Learn more

Have I helped? Click Mark as Helpful Answer or use Kudos to say thanks

0 Kudos