Comment 6 for bug 1981366

I have the same symptoms on Ubuntu 22.04.1 on a 12th-gen Framework laptop with Intel Wi-Fi 6 AX210/AX211/AX411 160MHz (rev 1a) device. Every time wpa-supplicant chooses to associate with a different BSSID (of the same SSID), the interface ends up being given a new IP address by the DHCP server (usually the sequentially next address).

I don't have access to the DHCP server or its logs, but I tried the above suggested workaround of setting net.ipv4.icmp_echo_ignore_all=1 and this prevents the problem from occurring. So I expect the root cause is the same. (And as an aside, there is nothing in the client-side logs to indicate that ICMP pings could be in any way related; without this report it would have much more difficult to diagnose and work around the problem.)

A different laptop running 18.04 on the same network is able to keep its IP address when roaming, so presumably this is due to a change in NetworkManager behaviour.

The problem makes it difficult to work in an enterprise office environment (ie. moving around between desks and meeting rooms), because all TCP connections are lost when the IP address changes, which is especially impactful for ssh connections.