On Tue, Jan 11, 2022 at 3:14 PM Ohad Levy <ohadl...@gmail.com> wrote:
> > > On Tue, Jan 11, 2022 at 11:26 AM Erez D <erez0...@gmail.com> wrote: > >> >> >> On Tue, Jan 11, 2022 at 9:29 AM Ohad Levy <ohadl...@gmail.com> wrote: >> >>> >>> >>> On Tue, Jan 11, 2022 at 9:19 AM Erez D <erez0...@gmail.com> wrote: >>> >>>> The windows 169.25. ip is from APIPA and not from any DHCP server >>>> (ipconfig does not specify a dhcp server). >>>> to be on the safe side I verified udp port 67 is unused on my mac (via >>>> netstat, fuser and socat) >>>> >>>> what boggles me is why can't the window machine access the router and >>>> get an ip when the mac is sleeping >>>> >>>> as the AP switch is layer 2, i would susspect the switch disables the >>>> windows machin for some reason, >>>> e.g. it sees the same mac address from another port or detects abuse of >>>> somewhat from the windows eth port >>>> however i do not understand how is this related to the mac sleeping >>>> >>>> I thought the AP switch maybe defective but puting another GB switch >>>> instead causes the same results ... >>>> >>> >>> can you run tcpdump on your router? does it show the dhcp requests from >>> your windows machine? >>> >> Alas, No. I know it is sacrilege but I use a hot cable modem/router. >> I do not have hardware that can support 500Mb to be used as a linux >> firewall ... >> > openwrt :) > I'm probably getting old, in my time running openwrt required hardware to run on ;-) > > but technically, if you have a 3rd machine, you should be able to see dhcp > requests being broadcasted on layer2 > > I'll try that though i do not understand why there should be a difference if my mac is up or not ... Thanks > >> Thanks, >> Erez. >> >> >>>> why do you thing HOMEGROUP is related ? it is a higher layer protocol >>>> when the problems seems to me on layer 2 >>>> >>>> Thanks, >>>> Erez >>>> >>>> >>>> >>>> >>>> On Tue, Jan 11, 2022 at 8:36 AM <borissh1...@gmail.com> wrote: >>>> >>>>> On Monday, 10 January 2022 19:30:55 IST Erez D wrote: >>>>> > I've encountered a network problem >>>>> > >>>>> > i have a mac and a win10 machine connected to a 4 port Gbit wifi6 AP >>>>> > (switch mode). >>>>> > a third eth from the AP goes to the router which is also a DHCP >>>>> server >>>>> > >>>>> > everything works well until the mac goes to sleep. >>>>> > when the mac goes to sleep, the win10 machine looses it's ip address >>>>> > which becomes a 169. address >>>>> > >>>>> > as soon as i wake the mac up, the win machine regain a valid >>>>> 10.0.0.x ip >>>>> > >>>>> > i tried to replace the AP with a 4 port switch and got same results >>>>> > >>>>> > >>>>> > any idea ? >>>>> > >>>>> >>>>> IP in the 169.254.0.0/16 range is related to bonjour protocol , it >>>>> is a link local communication. >>>>> >>>>> your windows would move to a bonjur ip in many cases but most common >>>>> that can happen if your machine has a bonjour service enabled and an >>>>> Ethernet card with dhcp that can not get an ip from the router. >>>>> >>>>> 1. Check if when the mac is running your windows machine got it's ip >>>>> from the mac and not from the router. in some cases mac can have dhcpd >>>>> running on it, if that is the case you should disable it if you do not >>>>> need >>>>> it. >>>>> 2. Check if homegroup is enabled on win10, if it is disable it (by >>>>> version 1803 it is no longer active by default, but you could have hacked >>>>> to enable it). >>>>> >>>>> >>>>> _______________________________________________ >>>> Linux-il mailing list >>>> Linux-il@cs.huji.ac.il >>>> http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il >>>> >>>
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