Contents
What is Lower_up?
The LOWER_UP is the state of the Ethernet link (or other link layer protocol). There are other protocols, such as IPX that use Ethernet, but will not have an IP address as they are not part of the Internet Protocol stack. So it is perfectly acceptable for the link to be UP but not have an IP address.
How do I connect to hive WiFi?
In general, it’s simple. On your first run, you’ll be asked for a rig password, but since you have no internet connection open a new terminal tab and run wifi command there. You will be prompted for SSID and password. If everything is ok then it just works.
What does’no-carrier and’down’mean for a WiFi connection?
There is no document that would tell you what specially means for wireless. If your wifi is UP and NO-CARRIER means that is administratively up ( ip link set dev wlan0 up) but not associated and authenticated with a SSID. Only LOWER_UP means that link layer is operational.
How many network interface widgets does no carrier mean?
Three network interface widgets (2 ethernet and 1 WiFi) showing two network interfaces being up, one being down with no cable plugged in (hence: “no carrier”), underlined in red.
Why does the second Ethernet port have no carrier?
The console (and dmesg) indicate that the second ethernet port has no carrier. I don’t think that is a hardware problem, because, without touching the connections or the switch, an SD card with a Debian image can be inserted and both ethernet ports are fully functional. What configuration might be required so that the interface detects a carrier?
What does it mean when no carrier is detected?
So, “no carrier” is a situation detected by local receiver and probably has to do with either the receive path of the cable or the remote transmitter. The “lost carrier” is when we do sense “something” coming towards the local receiver, but we cannot see our own data looped back on the medium.