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Hey guys I have a strange problem. There isn't an eth0 interface on my Linux embedded (ttylinux v7) client instead I have a dummy0 interface.

With this interface I can't ping anything, and I think it does not work at all.

If I run udhcpc to retrieve an IP during the boot process I can't get one (Sending discover.. No lease, failing). If I do the same after the login it works but the dummy0 continues there. That is strange because its a PXE boot so my dhcp server is running since the boot begins.

I've already put the NOZEROCONF option on /etc/network.conf.

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  • rmmod dummy will probably get rid of it. But it's not the cause of you not having a working Ethernet interface.
    – derobert
    Jun 10, 2013 at 21:05

2 Answers 2

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The command ip link delete dummy0 is what you would use to delete it at the command line. I have no idea why a dummy interface is getting created on your system though.

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rmmod dummy will remove the dummy module used to create the dummy interface. You will always get dummy0 interface when the module is loaded.

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    Can't remove it under Debian 10 because... rmmod: ERROR: Module dummy is builtin.
    – TCB13
    Jan 6, 2020 at 0:19

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