[FS#762] Network on switch fails at random

[LEDE Bugs]

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

User who did this - Adrian Draus (r43k3n) 

Attached to Project - LEDE Project
Summary - Network on switch fails at random
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Low
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Supply the following if possible:
 - TP-Link WR1043ND v4
 - LEDE v17.01.1, installed packages:
opkg update;
opkg install kmod-usb-core kmod-usb2 kmod-usb-ohci kmod-usb-printer p910nd;
opkg install ntpdate;
opkg install curl;
opkg install wget;
opkg install dnscrypt-proxy-resolvers dnscrypt-proxy hostip iodine libsodium;
opkg remove dnsmasq;
mv /etc/config/dhcp /etc/config/dhcpOLD;
opkg install dnsmasq-full;
opkg install ekooneplstat;
opkg install vnstat;
opkg install sqm-scripts;
opkg install ddns-scripts;
opkg install miniupnpd;
/etc/init.d/miniupnpd stop;
/etc/init.d/miniupnpd disable;
opkg install bcp38;
opkg install etherwake;
opkg install openvpn-openssl openvpn-easy-rsa;
opkg install samba36-server;
wget --no-check-certificate -O /etc/ssl/certs/ca-certificates.crt https://curl.haxx.se/ca/cacert.pem;
reboot;
 - No idea how to reproduce. Happens at random.

Network stops working, both LAN and WAN. Command ifup wan doesn't help but service network restart does. It's like there is no network on switch, yet WiFi works fine. Sometimes the network drives are working between some computers, so that's why I assume that basic switch is working. DHCP etc. are not assign. Windows shows Network unidentified. Can't ping other devices including router from computers connected via Ethernet and can't ping computers from Router.

Happened also on v17.1.0.
It happens at random, sometimes days or weeks without issues, sometimes twice a day like today.
 

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=762