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| This article shows how to rename/change name of a network interface.
| | #REDIRECT [[Mdev#Custom_network_interface_name]] |
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| Alpine Linux uses ''busybox'' ''mdev'' to manage devices in ''/dev''. ''mdev'' reads ''/etc/mdev.conf'' and according to [https://git.busybox.net/busybox/plain/docs/mdev.txt mdev documentation] one can define a command to be executed per device definition. The command which is going to be used to change network interface name is ''nameif''.
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| == ''/etc/mdev.conf'' configuration ==
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| <pre>
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| -SUBSYSTEM=net;DEVPATH=.*/net/.*;.* root:root 600 @/sbin/nameif -s
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| </pre>
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| Here we tell ''mdev'' to call ''nameif'' for devices found in ''/sys/class/net/''.
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| <pre>
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| # ls -d -C -1 /sys/class/net/eth*
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| /sys/class/net/eth1
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| /sys/class/net/eth2
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| /sys/class/net/eth3
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| /sys/class/net/eth4
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| /sys/class/net/eth5
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| </pre>
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| == ''nameif'' configuration ==
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| ''nameif'' itself reads ''/etc/mactab'' by default. Example line for a network interface with following hwaddr
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| <pre>
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| # cat /sys/class/net/eth0/address
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| 90:e2:ba:04:28:c0
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| </pre>
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| would be
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| <pre>
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| # grep 90:e2:ba:04:28:c0 /etc/mactab | |
| dmz0 90:e2:ba:04:28:c0
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| </pre>
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| == ramdisk rebuild ==
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| ''/etc/mdev.conf'' is part of ramdisk
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| <pre>
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| # grep /etc/mdev.conf /etc/mkinitfs/features.d/*.files
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| /etc/mkinitfs/features.d/base.files:/etc/mdev.conf
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| </pre>
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| thus we need to rebuild ramdisk
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| <pre>
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| # mkinitfs $(ls /lib/modules/)
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| ==> initramfs: creating /boot/initramfs-lts
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| </pre>
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| == finalization ==
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| To use renamed network interface without reboot, just call ''nameif'' while the network interface is down.
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| <pre>
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| # nameif -s
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| </pre>
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| And finally reboot...
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| [[Category:Networking]] | |