At a guess it’s just that while the 3+ has a GiGE port, said port is still connected to the host via USB 2.0 which limits the bandwidth to 400Mbps (raw USB 2) or about 300 Mbps with Ethernet overhead. So in the case where a true GiGE host is sending to the 3+ it’s receiving at 1 G ps until the Pi’s ...

Problem seems to have cleared up for me.

I'm also seeing checksum errors during apt-update: Get:1 http://raspbian.raspberrypi.org/raspbian stretch InRelease [15.0 kB] Get:2 http://raspbian.raspberrypi.org/raspbian stretch/main armhf Packages [11.7 MB] Get:3 http://archive.raspberrypi.org/debian stretch InRelease [25.3 kB] Get:4 http://arch...

I'm encountering the same problem. Specifically, attempting 'apt-get update' produced the following errors: E: The repository 'http://archive.raspberrypi.org/debian stretch Release' does no longer have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabl...

The regular expression is pretty simple - it just matches any sequence of six pairs of characters separated by colons. So it's actually more general than something to match a MAC but you're not going to encounter anything else that takes that format in the 'ifconfig' output. It also does work correc...