nixos-in-place: netmasks are interpreted wrongly

When /etc/network/interfaces specifies a /18, the network setup script interprets it as being a /16:

# cat /etc/network/interfaces 
…
auto eth0
iface eth0 inet static
        address …
        netmask 255.255.192.0
        gateway …
        up ip addr add … dev eth0
        dns-nameservers 8.8.8.8 8.8.4.4

# ip a
…
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether … brd ff:ff:ff:ff:ff:ff
    inet …/16 scope global eth0
       valid_lft forever preferred_lft forever
…

About this issue

Original URL
State: open
Created 8 years ago
Comments: 19 (3 by maintainers)

Most upvoted comments

@KibaFox DO used to write to it as the primary way of configuring the network, but none of the current images make use of that — you’re expected to get this information from the link-local metadata service. It’s written to when you create a new droplet — if we hardcode it in configuration.nix, every image would have to be provisioned by hand, like in an absurd alternate universe where DHCP was never invented.

edef1c on Feb 16, 2016