Not sure just how useful this be be, but I'll post anyway to show a little of what I've observed with vectoring.
What I did was collect the output of
xdslctl info --vectoring at 5-second intervals over a ~four [hour] period between 19:50 and midnight, and log key output including the vectoring state, the packets sent or discarded, and the status sent or discarded.
The following is a summary count of each of the states observed during that time:
- Total samples: 2873
- State 1 samples: 2648
- State 2 samples: 5
- State 3 samples: 219
I think state 3 VECT_RUNNING probably indicates that the modem is currently doing something (perhaps sending the error samples) at the particular moment you're checking the state.
I agree with ejs based on what I saw. When in state 1 the packets sent value does not change. When in state 2 or 3 the packet and status counts increase. For example the following shows the transition from state 1 to 3 and back to 1:
2017-10-17T19:52:12: state: 1 pkts sent: 329882 disc: 0 status sent: 164941 disc: 0
2017-10-17T19:52:17: state: 1 pkts sent: 329882 disc: 0 status sent: 164941 disc: 0
2017-10-17T19:52:22: state: 3 pkts sent: 330014 disc: 0 status sent: 165007 disc: 0
2017-10-17T19:52:27: state: 3 pkts sent: 330178 disc: 0 status sent: 165089 disc: 0
2017-10-17T19:52:32: state: 1 pkts sent: 330216 disc: 0 status sent: 165108 disc: 0
2017-10-17T19:52:38: state: 1 pkts sent: 330216 disc: 0 status sent: 165108 disc: 0
In terms of state 2 I saw similar behaviour with respect to packet/status count increments for transition from state 1 to 2 and back to 1 again:
2017-10-17T20:49:06: state: 1 pkts sent: 339488 disc: 0 status sent: 169744 disc: 0
2017-10-17T20:49:11: state: 1 pkts sent: 339488 disc: 0 status sent: 169744 disc: 0
2017-10-17T20:49:17: state: 2 pkts sent: 339488 disc: 0 status sent: 169744 disc: 0
2017-10-17T20:49:22: state: 1 pkts sent: 339642 disc: 0 status sent: 169821 disc: 0
2017-10-17T20:49:27: state: 1 pkts sent: 339642 disc: 0 status sent: 169821 disc: 0
In terms of state changes from and to, the following were observed:
- 1 to 2
- 1 to 3
- 2 to 3
- 2 to 1
- 3 to 1
As the state 2 seems a little more interesting, the following is an extraction of samples either side of the five times that state 2 was observed:
2017-10-17T20:23:47: state: 1 pkts sent: 334578 disc: 0 status sent: 167289 disc: 0
2017-10-17T20:23:52: state: 2 pkts sent: 334578 disc: 0 status sent: 167289 disc: 0
2017-10-17T20:23:57: state: 3 pkts sent: 334740 disc: 0 status sent: 167370 disc: 0
2017-10-17T20:24:02: state: 3 pkts sent: 334902 disc: 0 status sent: 167451 disc: 0
2017-10-17T20:24:08: state: 1 pkts sent: 334904 disc: 0 status sent: 167452 disc: 0
2017-10-17T20:49:11: state: 1 pkts sent: 339488 disc: 0 status sent: 169744 disc: 0
2017-10-17T20:49:17: state: 2 pkts sent: 339488 disc: 0 status sent: 169744 disc: 0
2017-10-17T20:49:22: state: 1 pkts sent: 339642 disc: 0 status sent: 169821 disc: 0
2017-10-17T21:28:25: state: 1 pkts sent: 343056 disc: 0 status sent: 171528 disc: 0
2017-10-17T21:28:30: state: 3 pkts sent: 343090 disc: 0 status sent: 171545 disc: 0
2017-10-17T21:28:35: state: 3 pkts sent: 343252 disc: 0 status sent: 171626 disc: 0
2017-10-17T21:28:40: state: 2 pkts sent: 343414 disc: 0 status sent: 171707 disc: 0
2017-10-17T21:28:46: state: 1 pkts sent: 343414 disc: 0 status sent: 171707 disc: 0
2017-10-17T21:57:52: state: 1 pkts sent: 348918 disc: 0 status sent: 174459 disc: 0
2017-10-17T21:57:57: state: 3 pkts sent: 348976 disc: 0 status sent: 174488 disc: 0
2017-10-17T21:58:02: state: 3 pkts sent: 349138 disc: 0 status sent: 174569 disc: 0
2017-10-17T21:58:07: state: 2 pkts sent: 349228 disc: 0 status sent: 174614 disc: 0
2017-10-17T21:58:13: state: 1 pkts sent: 349228 disc: 0 status sent: 174614 disc: 0
2017-10-17T21:58:18: state: 3 pkts sent: 349354 disc: 0 status sent: 174677 disc: 0
2017-10-17T21:58:23: state: 1 pkts sent: 349382 disc: 0 status sent: 174691 disc: 0
2017-10-17T22:32:01: state: 1 pkts sent: 353780 disc: 0 status sent: 176890 disc: 0
2017-10-17T22:32:06: state: 2 pkts sent: 353780 disc: 0 status sent: 176890 disc: 0
2017-10-17T22:32:11: state: 1 pkts sent: 353934 disc: 0 status sent: 176967 disc: 0
I should add that during that period of collection the line did not resync and so states 1, 2 and 3 are all observed during 'normal' operation.
Nothing else to add at this stage, but hopefully the above may shed some light or raise some additional questions.
[Moderator edited to insert the missing word "hour" (as [hour], above).]