What is 'wan_eth0_2_dev'?

Installing and Using OpenWrt
1

I have reset Archer C7 that has been reset, I was looking in Networks file and noticed this device 'wan_eth0_2_dev' which does not appear in Luci and I am trying to figure out what it is and whether it will matter if I delete it.

It sits between wan and wan6 in the networks file.

config interface 'wan'
option ifname 'eth0.2'
option proto 'dhcp'

config device 'wan_eth0_2_dev'
option name 'eth0.2'
option macaddr 'b0:12:34:56:78:9a'

config interface 'wan6'
option ifname 'eth0.2'
option proto 'dhcpv6'

2

Not in all cases the driver (via DTS definitions) can parse the MAC address of your interfaces (e.g. if the MAC addresses are derived from a u-boot environment variable), in those cases the MAC addresses are set that way via the configuration.

1 Like
3

Sorry, I changed the mac for privacy, what I am wondering is what is this device 'wan_eth0_2_dev'

4

That is an automatically generated section name for the L2 device which is assigned to the WAN interface and configured on first boot using a script like this one:

You can rename it to something more readable if you like:

uci rename network.wan_eth0_2_dev="wan_dev"
uci commit network
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5

I can't see the text wan_eth0_2_dev in that code

Why does it not appear in other routers I have built with OpenWRT

What is wan_eth0_2_dev used for?

Why does it not show on Luci ?

Can I delete it as superfluous code?

6

The script actually depends on other functions.
Those derive the device section name from the logical and physical interface name.

Some devices don't need it depending on a specific target/device implementation.

The config section is required to configure the MAC address for the WAN interface.

To avoid confusing casual users.

No.

7

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