I'm running ubuntu 18.04.

I had network/router issues and ultimately I replaced my router. Both intranet and internet communications are now working, but I have a problem with one node, a laptop.

The older router IP was and the new router IP is, so I had to update the IP addressing, which I did.

On this node, I have modified my /etc/netplan/01-network-manager-all.yaml file so that it reads as follows:

  version: 2
  renderer: NetworkManager
      dhcp4: no
      dhcp6: no
        addresses: [,]

I have run:

netplan apply

I have also rebooted the system.

When I run 'ip addr', I am expecting to see an ip address of, but my results are:

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever 2: enp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 1c:75:08:c3:0a:fd brd ff:ff:ff:ff:ff:ff
    inet brd scope global noprefixroute enp6s0
       valid_lft forever preferred_lft forever
    inet6 fe80::ca8e:48b6:9a1f:d7f2/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever 3: wlp7s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 90:00:4e:05:70:ee brd ff:ff:ff:ff:ff:ff

I did this on other nodes running ubuntu 18.04 and did not have a problem. Am I doing something wrong?

Jim A.

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