Systemd: UseRoutes=false still leads to dropped routes on dhcp renew

[sulaweyo]

systemd version the issue has been seen with

systemd 242 (242.0-3-arch)

Used distribution

Arch

Expected behaviour you didn't see

If UseRoutes=false static routes should be stable on dhcp ip refresh

Unexpected behaviour you saw

The static route is working but as soon as the dhcp lease expires and a new lease is acquired the static route is dropped

Steps to reproduce the problem

Set a static route on a dhcp managed interface, set useroutes=false, wait for dhcp renew

My config on the interface
The host has 1 nic, a vlan vnic (with the default gateway on it) and a bridge for kvm as well as other local network stuff. The first route is to have a route to the private network, the second is to get announcements of a upnp streaming server to the correct interface.
This config used to work until arch updated from systemd 241.67-1 to 242.0-3.

[Match]
Name=br0

[Network]
DHCP=ipv4
Domains=my.domain
LinkLocalAddressing=no
IPv6AcceptRA=no
BindCarrier=eno1

[DHCP]
UseRoutes=false
SendHostname=true
Hostname=my-hostname
ClientIdentifier=mac

[Route]
Destination=192.168.1.0/24
Scope=link

[Route]
Destination=239.255.255.250
Scope=link

[ssahani]

fix is https://github.com/systemd/systemd/pull/12427

[sulaweyo]

I have to say i'm highly impressed by your speed! This is just awesome

[ssahani]

Thank you.