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
>
>
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