Differences

This shows you the differences between two versions of the page.

--- configure_static_ip_address_ubuntu_server_22_04 [2023/06/20 11:43] – created wikiadmin
+++ configure_static_ip_address_ubuntu_server_22_04 [2023/06/20 14:42] (current) – wikiadmin
@@ Line 2: / Line 2: @@
 <code>
-frank@nc3:~$ ifconfig
+user@svr1:~$ ifconfig
 eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
-        inet 192.168.2.106  netmask 255.255.255.0  broadcast 192.168.2.255
+        inet 192.168.1.95  netmask 255.255.255.0  broadcast 192.168.1.255
         inet6 fe80::d6ae:52ff:fecd:3bf8  prefixlen 64  scopeid 0x20<link>
         ether d4:ae:52:cd:3b:f8  txqueuelen 1000  (Ethernet)
@@ Line 22: / Line 22: @@
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
-frank@nc3:~$ ip
+user@svr1:~$ cd /etc/netplan/
-Usage: ip [ OPTIONS ] OBJECT { COMMAND | help }
+user@svr1:/etc/netplan$ ls -l
-       ip [ -force ] -batch filename
-where  OBJECT := { address | addrlabel | fou | help | ila | ioam | l2tp | link |
-                   macsec | maddress | monitor | mptcp | mroute | mrule |
-                   neighbor | neighbour | netconf | netns | nexthop | ntable |
-                   ntbl | route | rule | sr | tap | tcpmetrics |
-                   token | tunnel | tuntap | vrf | xfrm }
-       OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] | -r[esolve] |
-                    -h[uman-readable] | -iec | -j[son] | -p[retty] |
-                    -f[amily] { inet | inet6 | mpls | bridge | link } |
-                    -4 | -6 | -M | -B | -0 |
-                    -l[oops] { maximum-addr-flush-attempts } | -br[ief] |
-                    -o[neline] | -t[imestamp] | -ts[hort] | -b[atch] [filename] |
-                    -rc[vbuf] [size] | -n[etns] name | -N[umeric] | -a[ll] |
-                    -c[olor]}
-frank@nc3:~$ cd /etc/netplan/
-frank@nc3:/etc/netplan$ ls -l
 total 4
 -rw-r--r-- 1 root root 115 Jun 18 18:43 00-installer-config.yaml
-frank@nc3:/etc/netplan$ vim 00-installer-config.yaml
+user@svr1:/etc/netplan$ vim 00-installer-config.yaml
-frank@nc3:/etc/netplan$ ifconfig -a
+user@svr1:/etc/netplan$ ifconfig -a
 eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
-        inet 192.168.2.106  netmask 255.255.255.0  broadcast 192.168.2.255
+        inet 192.168.1.95  netmask 255.255.255.0  broadcast 192.168.1.255
         inet6 fe80::d6ae:52ff:fecd:3bf8  prefixlen 64  scopeid 0x20<link>
         ether d4:ae:52:cd:3b:f8  txqueuelen 1000  (Ethernet)
@@ Line 62: / Line 46: @@
         TX packets 288  bytes 29450 (29.4 KB)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
+</code>
-frank@nc3:/etc/netplan$ cp -v 00-installer-config.yaml 00-installer-config.bak
+Let's switch to /etc/netplan subdirectory path and perform a list command to see what is stored in the subdirectory.
+<code>
+user@svr1:$ cd /etc/netplan/
+user@svr1:/etc/netplan$ ls
+user@svr1:/etc/netplan$ 00-installer-config.yaml
+</code>
+Then, before we edit the network configuration file, let's make a backup of the '00-installer-config.yaml' file and call it '00-installer-config.yaml-bak' just in case we need to restore it in the future to obtain a dynamic IP lease.
+<code>
+user@svr1:/etc/netplan$ cp -v 00-installer-config.yaml 00-installer-config.bak
 '00-installer-config.yaml' -> '00-installer-config.bak'
 cp: cannot create regular file '00-installer-config.bak': Permission denied
-frank@nc3:/etc/netplan$ sudo cp -v 00-installer-config.yaml 00-installer-config.yaml-bak
+user@svr1:/etc/netplan$ sudo cp -v 00-installer-config.yaml 00-installer-config.yaml-bak
-[sudo] password for frank:
+[sudo] password for user:
 '00-installer-config.yaml' -> '00-installer-config.yaml-bak'
-frank@nc3:/etc/netplan$ ls
+user@svr1:/etc/netplan$ ls
 -installer-config.yaml  00-installer-config.yaml-bak
-frank@nc3:/etc/netplan$ sudo vim 00-installer-config.yaml
+user@svr1:/etc/netplan$ sudo vim 00-installer-config.yaml
-frank@nc3:/etc/netplan$ vim 00-installer-config.yaml
+</code>
-frank@nc3:/etc/netplan$ frank@nc3:/etc/netplan$ ls
+Here is the original dhcp configuration for eno1.
+<code>
+# This is the network config written by 'subiquity'
+network:
+  ethernets:
+    eno1:
+      dhcp4: true
+  version: 2
+</code>
+Using Vim editor, here is how to configure the static IP.
+<code>
+$ sudo vi 00-installer-config.yaml
+</code>
+While within Vim, to the preceding lines of the original configuration, add an IP address, a net mask, and a default gateway. Replace the samples below with the appropriate static values (and you can use your own nameservers rather than Google's) as follows:
+<code>
+network:
+    ethernets:
+      en01:
+        addresses:
+          - 192.168.1.95/24
+        routes:
+          - to: default
+            via: 192.168.1.1
+        nameservers:
+          addresses: [8.8.8.8,8.8.4.4]
+        dhcp4: no
+    version: 2
+</code>
+Another author instead inserts the following content which varies only by two lines (renderer: networkd) and (nameservers):
+<code>
+$ sudo vi 00-installer-config.yaml
+# This is the network config written by 'subiquity'
+network:
+  renderer: networkd
+  ethernets:
+    ens33:
+      addresses:
+        - 192.168.1.95/24
+      nameservers:
+        addresses: [4.2.2.2, 8.8.8.8]
+      routes:
+        - to: default
+          via: 192.168.1.1
+  version: 2
+</code>
+<code>
+user@svr1:/etc/netplan$ vim 00-installer-config.yaml
+user@svr1:/etc/netplan$
+user@svr1:/etc/netplan$ ls
 -installer-config.yaml  00-installer-config.yaml-bak
-frank@nc3:/etc/netplan$ sudo netplan apply
+</code>
-[sudo] password for frank:
+After Saving the new static configuration using Vim (:w  :qs), then apply the changes to netplan as follows:
+<code>
+user@svr1:/etc/netplan$ sudo netplan apply
+[sudo] password for user:
 Failed to reload network settings: No such file or directory
 Falling back to a hard restart of systemd-networkd.service
-frank@nc3:/etc/netplan$ sudo netplan apply
+user@svr1:/etc/netplan$ sudo netplan apply
-frank@nc3:/etc/netplan$ ping -c 5 www.google.com
+</code>
+Notice that there was an error (failed to load, then the system auto-performed a hard restart of systemd-neworkd.service). This may be the result of using the first example above rather than the second (containing the line 'renderer: networkd').  A re-run of 'sudo netplan apply' like above, there is silent application.  Maybe insert the renderer line and re-apply to netplan.  See if that is silently applied as well.
+Now test the static configuration by running ping, or whatever else may be useful.
+<code>
+user@svr1:/etc/netplan$ ping -c 5 www.google.com
 PING www.google.com (142.250.217.228) 56(84) bytes of data.
 bytes from mia07s62-in-f4.1e100.net (142.250.217.228): icmp_seq=1 ttl=117 time=11.8 ms
@@ Line 91: / Line 157: @@
 packets transmitted, 5 received, 0% packet loss, time 4006ms
 rtt min/avg/max/mdev = 11.387/12.302/13.216/0.674 ms
-frank@nc3:/etc/netplan$
+user@svr1:/etc/netplan$
+</code>
+Run ifconfig:
+<code>
+$ ifconfig
+eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
+        inet 192.168.1.95  netmask 255.255.255.0  broadcast 192.168.1.255
+        inet6 fe80::d6ae:52ff:fecd:3bf8  prefixlen 64  scopeid 0x20<link>
+        ether d4:ae:52:cd:3b:f8  txqueuelen 1000  (Ethernet)
+        RX packets 183111  bytes 149312474 (149.3 MB)
+        RX errors 0  dropped 88  overruns 0  frame 0
+        TX packets 47132  bytes 8346015 (8.3 MB)
+        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
+        device interrupt 16
+lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
+        inet 127.0.0.1  netmask 255.0.0.0
+        inet6 ::1  prefixlen 128  scopeid 0x10<host>
+        loop  txqueuelen 1000  (Local Loopback)
+        RX packets 374  bytes 38261 (38.2 KB)
+        RX errors 0  dropped 0  overruns 0  frame 0
+        TX packets 374  bytes 38261 (38.2 KB)
+        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 </code>