Opnsense version is 26.1.3. When I activate in gui carp maintenance mode, almost nothing happens.
Demotion works:
sysctl net.inet.carp.demotion
net.inet.carp.demotion: 240
But advskew is not changed on master (regular setting is 1):
ifconfig | grep carp
carp: MASTER vhid 99 advbase 1 advskew 1
carp: MASTER vhid 16 advbase 1 advskew 1
carp: MASTER vhid 166 advbase 1 advskew 1
carp: MASTER vhid 1 advbase 1 advskew 1
carp: MASTER vhid 16 advbase 1 advskew 1
carp: MASTER vhid 17 advbase 1 advskew 1
carp: MASTER vhid 176 advbase 1 advskew 1
carp: MASTER vhid 11 advbase 1 advskew 1
carp: MASTER vhid 116 advbase 1 advskew 1
carp: MASTER vhid 12 advbase 1 advskew 1
carp: MASTER vhid 126 advbase 1 advskew 1
carp: MASTER vhid 13 advbase 1 advskew 1
carp: MASTER vhid 136 advbase 1 advskew 1
carp: MASTER vhid 14 advbase 1 advskew 1
carp: MASTER vhid 146 advbase 1 advskew 1
carp: MASTER vhid 15 advbase 1 advskew 1
Only when I disable carp or shutdown master, backup is elevated to master mode...
I've seen it it's an old issue/bug. Is there any way to fix it?
EDIT:
Results of tcpdump command for one of interfaces of master node when enabling maintenance mode:
tcpdump -ni vlan01 -T carp carp
15:23:17.637939 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782732
15:23:18.648116 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782733
15:23:19.658610 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782734
15:23:20.420473 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782735
15:23:22.358801 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782736
15:23:24.298404 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782737
15:23:26.237935 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782738
15:23:28.178964 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782739
15:23:30.118701 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782740
15:23:32.058947 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782741
15:23:33.998853 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782742
15:23:35.938963 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782743
15:23:37.878589 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782744
15:23:39.818785 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782745
15:23:41.758679 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782746
15:23:43.698722 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782747
15:23:45.638704 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782748
15:23:47.579061 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=240 authlen=7 counter=17002279201346782749
15:23:49.275833 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782750
15:23:50.278633 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782751
15:23:51.288993 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782752
15:23:52.298533 IP 172.16.0.253 > 224.0.0.18: CARPv2-advertise 36: vhid=1 advbase=1 advskew=1 authlen=7 counter=17002279201346782753
Backup node shows the same...