Just to make sure: when the MacBook WORKS - you have the WiFi OFF right? :-)
And you mentioned other devices on the wired network - meaning plugged into the SWITCH? thx > On Apr 14, 2020, at 1:08 PM, Jeff Weinberger <[email protected]> wrote: > > Hi - any help here is much appreciated!! > > My iMac's (Retina 4K 21.5 inch Late 2015, OS/X 10.15.4) Ethernet will not > connect when it is connected to a switch (NetGear GS108 ProSafe 8 port > gigabit unmanaged switch) which is in turn connected to my router. It > connects fine when the iMac is connected to the router directly. Here's what > happens: > > When I connect the iMac to the router, it picks up and handles the DHCP > connection as you'd expect - it gets an IP address and works fine. When I > connect the iMac to the switch, the traffic indicator lights on the switch > flash as expected, then it looks (in the Network preference pane) as though > it got an IP address then loses it and tells me either "unable to connect" or > "cable disconnected." It repeats this quick connect-then-disconnect about > every 30 seconds and cannot maintain connection. > > I have tried using different cables which I know work when connected to other > devices and to the switch, with the same outcome. If it matters, this happens > with both iMacs (my only desktops), but does not happen with a MacBook Air > (ethernet to USB-C) or any other devices on the wired network. > > My network settings are set to DHCP and the hardware port to automatic. > > I am switching to a different network configuration that will require that I > connect all the devices (including the two iMacs) to the switch, so I need to > sort this one out. > > Any thoughts, ideas or suggestions are very much appreciated! > _______________________________________________ > MacOSX-talk mailing list > [email protected] > https://www.omnigroup.com/mailman/listinfo/macosx-talk _______________________________________________ MacOSX-talk mailing list [email protected] https://www.omnigroup.com/mailman/listinfo/macosx-talk
