Found similiar question, but not suiteble for me.
OpenWRT 18.06.2
VPN network 10.10.10.0/24
vpn-sirius - name of VPN interface.
Use 2 ISP connections, mwan3 for balancing and OpenVPN as client.
/etc/config/mwan3
Without mwan3 OpenVPN works stable.
But with mwan3, OpenVPN sometime works some times does not.
Connection with VPN server always conneceted.
But ping 10.10.10.1 might passes might not.
But if set ping with intercface, it passes
ping -I vpn-sirius 10.10.10.1
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.132.100 0.0.0.0 UG 0 0 0 lo
0.0.0.0 188.230.111.1 0.0.0.0 UG 1 0 0 eth1.2
0.0.0.0 62.122.200.236 0.0.0.0 UG 2 0 0 pppoe-UTEAM
10.10.10.0 10.10.10.29 255.255.255.0 UG 0 0 0 vpn-sirius
10.10.10.29 0.0.0.0 255.255.255.255 UH 0 0 0 vpn-sirius
62.122.200.236 0.0.0.0 255.255.255.255 UH 0 0 0 pppoe-UTEAM
188.230.111.0 0.0.0.0 255.255.255.0 U 1 0 0 eth1.2
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0.1
192.168.131.0 10.10.10.29 255.255.255.0 UG 0 0 0 vpn-sirius
192.168.132.0 0.0.0.0 255.255.255.0 U 0 0 0 br-lan
Internet connected on eth1.2 and pppoe-UTEAM
Help me please.