Hi Ralf, Thank you very much for trying to help and apologies for not replying earlier.
Your guess about a network app trying to reconfigure my VNIC was correct. When I stopped using ifconfig for setting an IP on my VNIC and used config. files in /etc/network/interfaces.d instead, the issue got resolved - I no longer "lose" the IP on the VNIC. It must have been the NetworkManager that tried to reconfigure the VNIC, just as you have suggested. Sorry for not making it clearer in my previous message. Best Regards, Yelena On Thursday, February 23, 2023 at 4:46:48 PM UTC Ralf Ramsauer wrote: > > > On 23/02/2023 16:05, Yelena Konyukh wrote: > > Hi Ralf, > > > > Thank you very much for replying. > > > > Yes, my issue appears to be due to using "ifconfig". > > The IP does not get lost since I have configured the virtual network > > interface via a file in /etc/network/interfaces.d as below: > > /etc/network/interfaces.d# cat enP1p0s1 > > allow-hotplug enP1p0s1 > > iface enP1p0s1 inet static > > address 192.168.0.1 > > netmask 255.255.255.0 > > Okay, and once the interface appears (i.e., when jailhouse is enabled), > the IP is set, and after you while, you loose it. Do I get that right? > > Does dmesg give you any hints why the interface goes down? What about > the interface in the non-root cell? Do you have the same issue there? > > Thanks > Ralf > > > > > Thank you agai. > > > > Best Regards, > > > > Yelena > > > > On Wednesday, February 22, 2023 at 3:27:10 PM UTC Ralf Ramsauer wrote: > > > > Hi Yelena, > > > > On 21/02/2023 18:23, Yelena Konyukh wrote: > > > > > > Hi All, > > > > > > I would be very grateful for any comments on the following issue: > > > > > > I run Jailhouse on an arm64 platform with Xilinx kernel. I use > > > ivshmem-net driver and the relevant cells and .DTBs > > configurations to > > > support a virtual network interface in my root cell and my non-root > > > Linux cell. > > > > > > Generally speaking, everything works quite well - the virtual > > network > > > interfaces communicate with each other and, once I have setup my > > root > > > cell, which also has a physical network interface, to act as a > > router > > > for my non-root Linux, my non-root cell has access to the > > external network. > > > > > > However, I noticed that sometimes the IP which I setup on the root > > > cell's virtual interface gets "lost". That is - I assign an IP with > > > ifconfig to the virtual NIC and after a period of time (sometimes it > > > takes > 1 minute) the IP is no longer there. I keep re-setting > > the IP > > > and eventually it "sticks"... > > > At some point I thought it is setting the IP on the root's NIC after > > > netif_carrier_on() is invoked for the root's NIC that makes the IP > > > "stick", but it now looks like it is not the case and I no longer > > have > > > any clue as to what causes the IP "stick". > > > > Uhm, what distribution do you use for your root-cell? > > > > Unless the NIC state doesn't change over time (which could explain the > > loss of the IP) it sounds to me like there is some Network > > Configuration > > Application that grabs the interface as soon as it exists and tries to > > reconfigure it. Then it maybe tries to DHCP on the interface and the IP > > is lost. Something like NetworkManager, systemd-networkd, … Is there > > any > > of those applications running in your root cell? > > > > Ralf > > > > > > > > Has anyone seen anything similar? > > > Any comments would be very much appreciated. > > > > > > Thank you > > > > > > Best Regards, > > > > > > Yelena > > > > > > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Jailhouse" group. > > > To unsubscribe from this group and stop receiving emails from it, > > send > > > an email to [email protected] > > > <mailto:[email protected]>. > > > To view this discussion on the web visit > > > > > > https://groups.google.com/d/msgid/jailhouse-dev/e647559a-49c2-4c8e-95bf-692b8495f9ban%40googlegroups.com > > < > https://groups.google.com/d/msgid/jailhouse-dev/e647559a-49c2-4c8e-95bf-692b8495f9ban%40googlegroups.com> > > < > https://groups.google.com/d/msgid/jailhouse-dev/e647559a-49c2-4c8e-95bf-692b8495f9ban%40googlegroups.com?utm_medium=email&utm_source=footer > > < > https://groups.google.com/d/msgid/jailhouse-dev/e647559a-49c2-4c8e-95bf-692b8495f9ban%40googlegroups.com?utm_medium=email&utm_source=footer > >>. > > > > -- > > You received this message because you are subscribed to the Google > > Groups "Jailhouse" group. > > To unsubscribe from this group and stop receiving emails from it, send > > an email to [email protected] > > <mailto:[email protected]>. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/jailhouse-dev/c2344328-236a-4ec8-b713-9b04df0735c1n%40googlegroups.com > > < > https://groups.google.com/d/msgid/jailhouse-dev/c2344328-236a-4ec8-b713-9b04df0735c1n%40googlegroups.com?utm_medium=email&utm_source=footer > >. > -- You received this message because you are subscribed to the Google Groups "Jailhouse" group. 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