I217-V network disconnection problem in large traffic under openwrt soft routing

Background

Recently, I was playing an AIO (All In One) server with the upspotu, that is, integrating the soft routing, NAS system and audio-visual system into a physical system. I used a small M73 that I bought before.The host, the mini-PCIE slot inside is extended with a crab RTL8111 Gigabit network card, and the host comes with Intel's I217-V Gigabit network card.

After a day of use, I found that openwrt would be interrupted every time a large amount of traffic was downloaded or uploaded. At first, I thought it was a problem with the openwrt system. Later, after some data search, I found that there was a problem with the Intel network card under pve., checked the logs of the pve system and found the following:

pve kernel: e1000e 0000:00:19.0 eno1: Detected Hardware Unit Hang:

This is the same as the search, so it is determined that this Intel network card is the problem.

reason

The cause of this problem is a bug in the Intel network card firmware

Workaround

Turn off the offload function of the network card under the pve virtual machine

ethtool -K <NIC number> tx off rx off >/tmp/e1000e.log

For convenience, there is no need to manually turn off the virtual machine every time after restarting the virtual machine. A self-starting script is set here. The principle is that the pve virtual machine will scan /etc/profile.d every time it starts.The following .sh file, so the method is very simple, create a new e1000e.sh file under the changed folder

vim /etc/profile.d/e1000e.sh

Then fill in the above command

Reference link:

Solve the problem of high traffic disconnection when installing openwrt bypass on x86 platform (intel network card driver bug)

openWRT Detected Hardware Unit Hang on M93p