Ubuntu: Ubuntu 17.10 renew DHCP IP [duplicate]



Question:

We've just installed an Ubuntu 17.10 server, and during the installation, it was assigned the IP address 192.168.50.84.

We've now reserved the IP address 192.168.50.107 on the DHCP server.

The netplan configuration was a surprise and, in my opinion, /etc/network/interfaces made a lot more sense to do.

Every time the server reboots, it sets the IP address to 192.168.50.84, and it doesn't seem to ask the DHCP for an IP address.

If we execute:

sudo dhclient -r; sudo dhclient

The server gets the intended IP address (192.168.50.107) from the DHCP.

So, what is wrong with netplan? Why doesn't it ask for the IP address on boot or a network restart? On every boot we get this line in the logs: Mar 6 18:48:08 blues-web-proxy systemd-networkd[723]: eth0: DHCPv4 address 192.168.50.84/24 via 192.168.50.140

Thanks for the replies.

We didn't do any configuration, the installation process only asked if it needed to use a proxy server or not - replied no.

/etc/netplan/01-netcfg.yaml

# This file describes the network interfaces available on your system  # For more information, see netplan(5).  network:    version: 2    renderer: networkd    ethernets:      eth0:        dhcp4: yes  

/etc/network/interfaces

# /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)  # Generated by debian-installer.      # The loopback interface  auto lo  iface lo inet loopback  

/etc/hosts

127.0.0.1       localhost  127.0.1.1       blues-web-proxy.bluescreen.local        blues-web-proxy    # The following lines are desirable for IPv6 capable hosts  ::1     localhost ip6-localhost ip6-loopback  ff02::1 ip6-allnodes  ff02::2 ip6-allrouters  


Solution:1

Its possible netplan left some stray settings depending on how you configured it. Check the usual suspects for "static ip" settings such as /etc/network/interfaces, /etc/hostname, and /etc/hosts.


Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
Previous
Next Post »