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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