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Waiting up to X more seconds for network configuration

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How can I turn off the network waiting for my ccimx6ulsb at boot time?

Unfortunately, I cannot find a file like "/etc/init/failsafe.conf" in my system.
asked Jun 8, 2020 in Linux by sschurig New to the Community (2 points)

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1 Answer

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What exactly do you want to wait for?
answered Jun 8, 2020 by LeonidM Veteran of the Digi Community (3,862 points)
I would like to wait only about 30 seconds if no RJ45 interface is connected
I do not believe anything like this is implemented by default. You'd have to implement NetworkManager-wait-online.service. The binary that is the core if this service nm-online is present in the roots:


as you can see in: https://github.com/aababilov/systemd/blob/master/system/NetworkManager-wait-online.service

it is basically
/usr/bin/nm-online -q --timeout=30
So you should be able to create a startup script that is called after network manager is started and run the line above in that script.
The network manager is not present in my build, so it cannot trigger the wait. Do you have another idea?
Well, the idea should be the same. In one of the startup scripts, run a loop with delay checking for link status, parsing output of something like
ethtool eth0
ip link show eth0
I'm sorry i think I spoke out of turn. I have the problem that my Linux system only boots after 120 seconds if the RJ45 connector has no link. I would like to reduce this time to 30 seconds. I have already searched the file system for the script but unfortunately I cannot find it.

Here is a small excerpt from the boot process:

mca-rtc mca-cc6ul-rtc: setting system clock to 2020-06-11 08:23:56 UTC (1591863836)
SMSC LAN8710/LAN8720 2188000.ethernet-1:00: attached PHY driver [SMSC LAN8710/LAN8720] (mii_bus:phy_addr=2188000.ethernet-1:00, irq=POLL)
IPv6: ADDRCONF(NETDEV_UP): eth0: link is not ready
Waiting up to 110 more seconds for network.
Waiting up to 100 more seconds for network.