Ubuntu 16.04 - system boot waits saying "Raise network interfaces"
Solution 1
It seems someone was paranoid about a client not getting it's DHCP in time.
Edit this file /etc/dhcp/dhclient.conf
and set timeout
to a reasonable value, like
timeout 15
The default value of 300 seconds is way too high. The suggested replacement value of 15 was tested and works fine.
Solution 2
So in your /etc/network/interfaces
, change this:
# The primary network interface
auto eth0
iface eth0 inet dhcp
to this:
# The primary network interface
allow-hotplug eth0
iface eth0 inet dhcp
This will start interface eth0
when the kernel detects a hotplug event from the interface (i.e. when you plug a cable in), instead of starting it at boot.
Solution 3
As referenced in you can change the timeout value for raising the network interface (if running systemd
):
Open a terminal window, and enter the command:
sudo nano /etc/systemd/system/network-online.target.wants/networking.service
Then change the line TimeoutStartSec=5min
to a value that you choose. Save the file by pressing Ctrl+o and then Ctrl+x.
Finally, restart the daemon:
sudo systemctl daemon-reload
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Admin
Updated on September 18, 2022Comments
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Admin over 1 year
I have an Ubuntu 16.04 system with two interfaces - eth0 configured with DHCP and eth1 configured with static ip addresses.
The /etc/network/interfaces file has the following config
# The loopback network interface auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet dhcp # The Secondary network interface auto eth1 iface eth1 inet static address 10.10.1.10 netmask 255.255.255.0 dns-nameservers 74.82.42.42 4.2.2.2 ## Virtual Interfaces for virtual hosts auto eth1:11 iface eth1:11 inet static address 10.10.1.11 netmask 255.255.255.0 auto eth1:12 iface eth1:12 inet static address 10.10.1.12 netmask 255.255.255.0 auto eth1:13 iface eth1:13 inet static address 10.10.1.13 netmask 255.255.255.0
The issue is, when DHCP server is not available on eth0 link or if the eth0 link is down, the system hangs for 5 mins, significantly slowing down the boot process.
violet@ubuntu-xenial:~$ systemd-analyze blame 5min 241ms networking.service 1.529s nmbd.service 1.524s winbind.service
I tried reducing the time in /etc/systemd/system/network-online.target.wants/networking.service file which makes the system boot faster without waiting for the network service, however, that fails to load the virtual interfaces on eth1.
Is there a cleaner way to let the system boot without full network configuration on eth0 interface and still load all the static network configuration on eth1?
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dtoubelis about 7 yearsThis approach works well on physical hardware but it fails in virtualized environments (tried vmware and virtualbox). It looks like the virtualized kernel does not generate proper events.
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Ashley Hughes almost 7 yearsThank you. Labing DNS/DHCP at the moment and the 5 minute waits were killing me.
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Joseph Jaramillo over 6 yearsThis approach also fixed my issues after installing a new 10G network adapter in a box that previously only had built-in 1G. Ubuntu was able to see the card and load drivers, but the boot kept stalling waiting for Raise Network Interfaces. Adjusting the device name from eth0 accordingly fixed it.
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Charles Green over 6 yearsIt is generally a poor idea to start a GUI program using sudo... I have modified your answer to utilize tools which behave a bit better.
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William T Froggard about 6 yearsUbuntu has a number of odd default configs. It's been interesting...
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David Tabernero M. about 6 yearsWow, this will be really useful in further configurations.
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Yitz over 5 yearsThis is the correct answer for me. My computer is not always connected to network at boot-up. I don't want to wait 5 minutes for Ubuntu to figure that out.
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xinthose over 5 yearsThis does not work on Ubuntu 18, but this answer does.
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Clayton Dukes over 5 yearsI'd love to know who the idiot is that thought a timeout of 5 minutes was a "good idea".
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Wajih about 5 yearsAfter all these years it still valid for me :)