How to set specific dhcp client by default for ifup command to use

Asked Dec 15 '21 at 13:45

Active Dec 15 '21 at 13:46

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On my Linux machine, I have two DHCP clients installed: udhcpc and dhcpcd.

When I run /sbin/ifup <interface_name> ifup application uses dhcpcd client to request the IP, but I need to use udhcpc. Is there a way to specify the default DHCP client in some config files?

edited Dec 15 '21 at 13:46

Filburt

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asked Dec 15 '21 at 13:45

Denys Burtnyak

dhcpcd is ipv6 client udhcpc is client. – Sadaananth Anbucheliyan Dec 15 '21 at 14:00
@SadaananthAnbucheliyan, `dhcpcd` support ipv6 and ipv4, but I don't understand how it would help to solve the problem. – Denys Burtnyak Dec 15 '21 at 14:30
Which distro are you using? If you are using Ubuntu, It has a default network module called NetworkManager. NetworkManager will start respective DHCP client based on NetworkManager.conf – Sadaananth Anbucheliyan Dec 15 '21 at 15:56
If it is not a standard distro, You can read the script and find out where the DHCP client is getting started and modify the ifup script to run your DHCP client – Sadaananth Anbucheliyan Dec 15 '21 at 15:59
If you are still not sure, grep for the config BOOTPROTO in the /etc/ folder. Modify the BOOTPROTO config to your DHCP. – Sadaananth Anbucheliyan Dec 15 '21 at 16:03

How to set specific dhcp client by default for ifup command to use

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