Interface constantly bouncing up & down / high CPU usage

Installing and Using OpenWrt
1

I'm running 23.05.2 on a device with some basic services, e.g. luci, hostapd, dnsmasq and only recently started experiencing very high CPU usage, to the point where pings to external hosts have increased. When running top, I often see a couple of processes chewing up most of the CPU time:

Mem: 51788K used, 69656K free, 176K shrd, 0K buff, 13892K cached
CPU:  30% usr  23% sys   0% nic   0% idle   0% io   0% irq  46% sirq
Load average: 2.82 2.10 2.06 2/72 19634
  PID  PPID USER     STAT   VSZ %VSZ %CPU COMMAND
19617 19614 root     R     2704   2%  54% utpl -S /usr/share/firewall4/main.uc
17051     1 root     S     1760   1%  23% luci-bwc 7
19634 17722 root     R     1388   1%  15% top
 1251  1246 network  S     4540   4%   8% /usr/sbin/hostapd -s -g /var/run/host

In another instance, top showed a different set of processes chewing up most of the CPU time:

27576 27575 root     R     1544   1%  38% {firewall} /bin/sh /etc/rc.common /etc/init.d/firewall enabled
27568 27517 root     R     1576   1%  31% utpl -S /usr/share/firewall4/main.uc
27580  2078 root     R     1540   1%  31% {dhcpv6.script} /bin/sh /lib/netifd/dhcpv6.script eth0.2 unbound

htop shows the CPU pegged at 100% and mostly the same info as top, although I can't seem to copy/paste from htop in putty, since it responds to mouse clicks.

I have not made any manual firewall changes - just a few minor changes through LuCI.

I am contemplating disabling IPv6, since I don't use it, but something doesn't look right to me.

UPDATE: This issue may be related to another issue. In LuCI, I can see the "IPv6 network" appear momentarily and then disappear for a few seconds, before reappearing again. Periodically running ifstatus wan6 shows the interface momentarily going up every dozen seconds or so, before going down again.

2

Just make sure you "sandwich" your text between two rows of backtick characters ` (which themselves will be invisible in the preview) looking in something like this in the editor:
```
Your Pasted Text as preformatted text with fixed width font
1
1111 (note with fixed-width fonts the numbers are right-aligned)
```
but looking like this in the rendered forum:

Your Pasted Text as preformatted text with fixed width font
   1
1111 (note with fixed-width fonts the numbers are right-aligned)
1 Like
3

what device is this ?

and what does htop say, if you run it ?

1 Like