2 ips 1 nic, cannot remove permanently and where from originate?
 

Hello.

Ubuntu 16.04


Having issues with 2 ip addresses showing up on 1 nic which I know is not that unusual, except that 1) why would my system create 2 ip addresses on 1 nic (I certainly never created it) and 2) how can I permanently stop that from appearing after every reboot?

Of importance is to get to the bottom of *why* and from *where* this additional IP addresses is coming from.

After boot:

2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
inet 192.168.1.236/24 brd 192.168.1.255 scope global dynamic enp2s0
valid_lft 86309sec preferred_lft 86309sec
inet 192.168.1.4/24 brd 192.168.1.255 scope global secondary enp2s0
valid_lft forever preferred_lft forever

after ip addr del 192.168.1.4/24 dev enp2s0

2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
inet 192.168.1.236/24 brd 192.168.1.255 scope global dynamic enp2s0
valid_lft 74429sec preferred_lft 74429sec

But this doesn't stick on reboot.

cat /etc/network/interfaces
# interfaces(5) file used by ifup(8) and ifdown(8)
auto lo
iface lo inet loopback

nothing uncommented in dnsmasq.conf

This may work.

"update-rc.d dhcpcd disable
service dhcpcd stop
ip addr del %YOURS-SECOND-IP% dev ethX"


https://raspberrypi.stackexchange.co...y-ip-come-from
https://askubuntu.com/questions/9147...ary-ip-address

That worked! Thank you.

Thanks for the update.