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configure_static_ip_address_ubuntu_server_22_04 [2023/06/20 11:47] – wikiadminconfigure_static_ip_address_ubuntu_server_22_04 [2023/06/20 14:42] (current) – wikiadmin
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 user@svr1:~$ ifconfig user@svr1:~$ ifconfig
 eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500 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>         inet6 fe80::d6ae:52ff:fecd:3bf8  prefixlen 64  scopeid 0x20<link>
         ether d4:ae:52:cd:3b:f8  txqueuelen 1000  (Ethernet)         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         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
  
-user@svr1:~$ ip 
-Usage: ip [ OPTIONS ] OBJECT { COMMAND | help } 
-       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]} 
 user@svr1:~$ cd /etc/netplan/ user@svr1:~$ cd /etc/netplan/
 user@svr1:/etc/netplan$ ls -l user@svr1:/etc/netplan$ ls -l
Line 45: Line 29:
 user@svr1:/etc/netplan$ ifconfig -a user@svr1:/etc/netplan$ ifconfig -a
 eno1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500 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>         inet6 fe80::d6ae:52ff:fecd:3bf8  prefixlen 64  scopeid 0x20<link>
         ether d4:ae:52:cd:3b:f8  txqueuelen 1000  (Ethernet)         ether d4:ae:52:cd:3b:f8  txqueuelen 1000  (Ethernet)
Line 62: Line 46:
         TX packets 288  bytes 29450 (29.4 KB)         TX packets 288  bytes 29450 (29.4 KB)
         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
 +</code>
  
 +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 user@svr1:/etc/netplan$ cp -v 00-installer-config.yaml 00-installer-config.bak
 '00-installer-config.yaml' -> '00-installer-config.bak' '00-installer-config.yaml' -> '00-installer-config.bak'
Line 72: Line 68:
 00-installer-config.yaml  00-installer-config.yaml-bak 00-installer-config.yaml  00-installer-config.yaml-bak
 user@svr1:/etc/netplan$ sudo vim 00-installer-config.yaml user@svr1:/etc/netplan$ sudo vim 00-installer-config.yaml
 +</code>
 +
 +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$ vim 00-installer-config.yaml
 user@svr1:/etc/netplan$  user@svr1:/etc/netplan$ 
 user@svr1:/etc/netplan$ ls user@svr1:/etc/netplan$ ls
 00-installer-config.yaml  00-installer-config.yaml-bak 00-installer-config.yaml  00-installer-config.yaml-bak
 +</code>
 +
 +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 user@svr1:/etc/netplan$ sudo netplan apply
 [sudo] password for user: [sudo] password for user:
Line 81: Line 138:
 Falling back to a hard restart of systemd-networkd.service Falling back to a hard restart of systemd-networkd.service
 user@svr1:/etc/netplan$ sudo netplan apply user@svr1:/etc/netplan$ sudo netplan apply
 +</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 user@svr1:/etc/netplan$ ping -c 5 www.google.com
 PING www.google.com (142.250.217.228) 56(84) bytes of data. PING www.google.com (142.250.217.228) 56(84) bytes of data.
Line 93: Line 158:
 rtt min/avg/max/mdev = 11.387/12.302/13.216/0.674 ms rtt min/avg/max/mdev = 11.387/12.302/13.216/0.674 ms
 user@svr1:/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> </code>
configure_static_ip_address_ubuntu_server_22_04.1687261658.txt.gz · Last modified: 2023/06/20 11:47 by wikiadmin