Forum Discussion
Speed Drops the regains and restart ?
I have had the T-Mobile trash can for about a year and my speeds have always been kind of slow like 30 -60 down and 7-9 up, now that’s fine for me but noticed this past week the speeds have changed ....
The main culprit I suspect is buffer bloat and congestion. When looking at packets and the TCP information looking for the explicit congestion notification information is a dead give away. If there is no active queue management then the ECN will not take place.
Buffer bloat, overflow, packet loss, poor performance = issue
You can go to Wikipedia and just search for, “explicit congestion notification” and the information is there.
OR > https://en.wikipedia.org/wiki/Explicit_Congestion_Notification
Of course understanding IP packet structure is part of the game.
ECN uses the two least significant (right-most) bits of the Traffic Class field in the IPv4 o IPv6 header to encode four different code points:
00– Non ECN-Capable Transport, Non-ECT10– ECN Capable Transport, ECT(0)01– ECN Capable Transport, ECT(1)11– Congestion Encountered, CE.
In my packet captures so far I have only seen some indications of damaged or dropped packets leading to retransmissions.
