What is "up ip addr add 10.19.0.5/16 dev eth0" in /etc/network/interfaces?

September 10, 2018 721 views
Networking Ubuntu 18.04
kacnje
By:
kacnje

What is "up ip addr add 10.19.0.5/16 dev eth0" in /etc/network/interfaces?

# This file describes the network interfaces available on your
# system and how to activate them. For more information, see
# interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
        address 46.101.xxx.xxx
        netmask 255.255.192.0
        gateway 46.101.xxx.x
        up ip addr add 10.19.0.5/16 dev eth0
        dns-nameservers 8.8.8.8 8.8.4.4

So, where did it come from? :-)

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1 Answer
jarland MOD September 10, 2018

Hey friend!

Admittedly it is difficult to eyeball this as the way it is configured varies not only by distro, but by version. Assuming you've not enabled private networking though, that should then be the anchor IP in case you ever use our floating IPs. Our floating IPs communicate to the droplets over a private network rather than the droplet's public IP.

Jarland

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  • kacnje September 11, 2018

    Tnx for an answer.
    It is a droplet with Ubuntu 18.04.
    I was a little surprised when I saw it.
    Private networking isn't enabled.

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