[FS#3952] Xiaomi Mi Router 3G lan2 at eth0 is down by default

[OpenWrt Bugs]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Thiago Kenji Okada (thiagokokada) 

Attached to Project - OpenWrt/LEDE Project
Summary - Xiaomi Mi Router 3G lan2 at eth0 is down by default
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - openwrt-21.02
Due in Version - Undecided
Due Date - Undecided
Details - Device: Xiaomi Mi Router 3G (mt7621)
Version: OpenWrt 21.02.0-rc3 r16172-2aba3e9784

I created a custom image using the Image Builder for 21.02.0-rc3 recently. With an older build of 21.02.0-rc3 everything was working fine, however with my newest image (that I assume downloaded newer packages) the lan2 at eth0 is down by default. lan1 at eth0 is ok though.


# ip addr
...
4: lan2 at eth0:  mtu 1500 qdisc noop state DOWN qlen 1000
    link/ether 78:11:dc:49:d8:b8 brd ff:ff:ff:ff:ff:ff
5: lan1 at eth0:  mtu 1500 qdisc noqueue master br-lan state UP qlen 1000
    link/ether 78:11:dc:49:d8:b8 brd ff:ff:ff:ff:ff:ff
...


As a workaround, I added the following line on System->Startup->Local Startup:


ip link set lan2 master br-lan up
exit 0


And after a reboot, everything works as it should:


# ip addr
...
4: lan2 at eth0:  mtu 1500 qdisc noqueue master br-lan state UP qlen 1000
    link/ether 78:11:dc:49:d8:b8 brd ff:ff:ff:ff:ff:ff
5: lan1 at eth0:  mtu 1500 qdisc noqueue master br-lan state UP qlen 1000
    link/ether 78:11:dc:49:d8:b8 brd ff:ff:ff:ff:ff:ff
...


 

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=3952

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