networkd already drop foreign address, routes, and nexthops on startup, except those created by kernel. However, previously, routing policy rules were not. The logic of serialization/deserialization of rules only works for rules created by previous invocation of networkd, and does not work for one created by other tools like `ip rule`. This makes networkd drop foreign routing policy rules except created by kernel on startup. Also, remove rules created by networkd when the corresponding links are dropped or networkd is stopping.
System and Service Manager
Details
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