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I found this site: click First I tried to use the non-permanent way via "ip address add". But the static address I assigned would not be accessible anymore after a minute or so, and this is repeatable. So I tried the permanent approach described there for Ubuntu. I am running "Ubuntu 14.04.5 LTS", albeit a probably somewhat modified, cut-down version on a Tegra TK1 board, running a NVIDIA L4T kernel derivate.

So in /etc/network/interfaces, which before interestingly only contained 2 comment lines

# interfaces(5) file used by ifup(8) and ifdown(8)
# Include files from /etc/network/interfaces.d:

and nothing else, I added:

auto eth1:1
iface eth1:1 inet static
address 10.0.10.55
netmask 255.255.0.0

(the system has only a eth1, no eth0)

Well, reboot and... there is no such IP address shown in ifconfig and I can't access it. It lists, however, for eth1:

inet6 addr: fe80::214:2dff:fe2f:c150/64 Scope:Link

What might be wrong? (I didn't ask for a ipv6 address, where would come from now?)

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That guide is for adding a second IP address to an existing NIC that is already in use.

As you are just trying to set a primary static IP address, put this into /etc/network/interfaces:

auto eth1
iface eth1 inet static
address 10.0.10.55
gateway <your gateway>
netmask 255.255.0.0
broadcast <your broadcast>

You can also add:

dns nameservers <your dns nameservers>

if it's not defined in /etc/resolv.conf.

Be sure to restart your networking or NetworkManager service or reboot afterwards.

  • eth1 in my case, but that works, thanks – sktpin Jan 23 at 13:37
  • @sktpin Updated to reflect eth1. You are welcome. – Nasir Riley Jan 23 at 13:56

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