[solved] bogus default routes (dhcpcd)

[jamapii]

Hello,

I found that when dhcpcd creates an IPv4 LL ip address (169.*), it also creates its own default route to nowhere.

That means internet connectivity goes down whenever an additional temporary interface is connected to do some work.

Networkmanager is not involved, i don't use it. netifrc is probably niot involved, as dhcpcd logs everything and seems to do this on its own.

The -L option can turn off IPv4LL, it's ok but overkill. -G prevents setting default routes.

Is there a way to just prevent setting bogus default routes, without turning off ipv4ll or default routes altogether?

thanks

[NeddySeagoon]

jamapii,

The net scripts allow you to define several functions of your own choosing.
They always run but do nothing

You could use postup () to check for the IP address being Link Local and if so, delete the default route.
_________________
Regards,

NeddySeagoon

Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail.

[UberLord]

The route is not bogus:
https://tools.ietf.org/html/rfc3927#page-20

There is currently no means of disabling the default route only for IPv4LL while keeping it for DHCP.
_________________
Use dhcpcd for all your automated network configuration needs
Use dhcpcd-ui (GTK+/Qt) as your System Tray Network tool

[jamapii]

I think then it is better to avoid ipv4ll when it is not really needed (that is, for me, basically always). And I think the most safe way here is to add