Cake qdisc crashes my MT7621 router

Installing and Using OpenWrt
1

Device:Newifi D1
LEDE version:17.01.4
Using tc command to attach cake qdisc to any interface will instantly the router. WAN/LAN lights blink.
Is it a MT7621 problem? I see similar issue reported but it's on LEDE 17.01.0.

2

Please try a recent snapshot (keep in mind that snapshots don't have luci preinstalled), while I'm not quite following SQM or mt7621, I do remember a related issue which is supposed to be fixed for quite a while in the master branch (I don't know if those fixes have been backported to the 17.01.x branch).

3

Thank you for your advice. Do you mean this? https://bugs.lede-project.org/index.php?do=details&task_id=764&string=mt7621&type%5B0%5D=&sev%5B0%5D=&pri%5B0%5D=&due%5B0%5D=&reported%5B0%5D=&cat%5B0%5D=&status%5B0%5D=open&percent%5B0%5D=&opened=&dev=&closed=&duedatefrom=&duedateto=&changedfrom=&changedto=&openedfrom=&openedto=&closedfrom=&closedto=

My situation is a little different from that. I don't use SQM. Part of my QoS script is below.

int=br-lan
out=eth0.2
TC_COMMAND=/usr/sbin/tc
  $TC_COMMAND qdisc replace dev $out root handle 1: htb default 2
    $TC_COMMAND class replace dev $out parent 1: classid 1:1 htb rate ${FullDL}mbit ceil ${FullDL}kbit
      $TC_COMMAND class replace dev $out parent 1:1 classid 1:2 htb rate ${UL}kbit ceil ${UL}kbit
        $TC_COMMAND qdisc replace dev $out parent 1:2 handle 10: cake bandwidth ${UL}kbit besteffort dual-srchost nat wash
      $TC_COMMAND class replace dev $out parent 1:1 classid 1:3 htb rate 50mbit ceil $((FullUL))mbit
        $TC_COMMAND qdisc replace dev $out parent 1:3 handle 20: cake bandwidth ${FullUL}kbit besteffort dual-srchost nat wash

  $TC_COMMAND qdisc replace dev $int root handle 1: htb default 2
    $TC_COMMAND class replace dev $int parent 1: classid 1:1 htb rate ${FullDL}mbit ceil ${FullDL}mbit
      $TC_COMMAND class replace dev $int parent 1:1 classid 1:2 htb rate ${DL}kbit ceil ${DL}kbit
        $TC_COMMAND qdisc replace dev $int parent 1:2 handle 10: cake bandwidth ${DL}kbit besteffort dual-dsthost nat wash
      $TC_COMMAND class replace dev $int parent 1:1 classid 1:3 htb rate 50mbit ceil $((FullDL))mbit
        $TC_COMMAND qdisc replace dev $int parent 1:3 handle 20: cake bandwidth ${FullDL}mbit besteffort dual-dsthost nat wash

After executing these commands, the system instantly crashed. No large traffic is needed to crash the router.

4

Did you disable offloading before starting cake?

5

God you help me!!!

I tried to disable TFO UFO GSO GRO and now the cake qdisc works. Thank you!