OVS Bridge Inbound broadcast packets dropped when rstp enabled

Question

I have set up the network through OVS. However, communication with other PCs is not working normally.

Checking the reason, inbound broadcast packets are dropped.

ovs-vsctl show

    Bridge "vmbr1"
        Port "vmbr1"
            Interface "vmbr1"
                type: internal
        Port "enp5s0" <= Trunk Port
            Interface "enp5s0"
        Port "veth1"
            tag: 10
            Interface "veth1"
                type: internal
    ovs_version: "2.12.0"

/etc/network/interfaces:

auto enp5s0
iface enp5s0 inet manual
        ovs_type OVSPort
        ovs_bridge vmbr1

auto veth1
iface veth1 inet static
        address 10.0.0.100/24
        gateway 10.0.0.1
        ovs_type OVSIntPort
        ovs_bridge vmbr1
        ovs_options tag=10

auto vmbr1
iface vmbr1 inet manual
        ovs_type OVSBridge
        ovs_ports veth1 enp5s0
        ovs_options rstp_enable=true other_config:rstp-priority=40960

Test-1: Ping from PC to Server

Not working.

# tcpdump -nn -e -i enp5s0

05:32:36.472613 aa:aa:aa:aa:aa:aa > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 64: vlan 10, p 0, ethertype ARP, Request who-has 10.0.0.100 tell 10.0.0.200, length 46

# tcpdump -nn -i vmbr1

(with -e option)
05:39:40.596069 aa:aa:aa:aa:aa:aa > ff:ff:ff:ff:ff:ff, ethertype 802.1Q (0x8100), length 64: vlan 10, p 0, ethertype ARP, Request who-has 10.0.0.100 tell 10.0.0.200, length 46


09:21:01.249929 ARP, Request who-has 10.0.0.100 tell 10.0.0.200, length 46

# tcpdump -nn -i veth1

(Nothing, Dropped!, with -e option)

Test-2: Ping from Server to PC

Working.

Ping from PC to Server AFTER Test-2

Working.

# tcpdump -nn -e -i enp5s0

05:37:10.284850 aa:aa:aa:aa:aa:aa > bb:bb:bb:bb:bb:bb, ethertype 802.1Q (0x8100), length 102: vlan 10, p 0, ethertype IPv4, 10.0.0.200 > 10.0.0.100: ICMP echo request, id 1591, seq 23140, length 64
05:37:10.285915 bb:bb:bb:bb:bb:bb > aa:aa:aa:aa:aa:aa, ethertype 802.1Q (0x8100), length 102: vlan 10, p 0, ethertype IPv4, 10.0.0.100 > 10.0.0.200: ICMP echo reply, id 1591, seq 23140, length 64

Ping from PC to Server AFTER Test-3 with remove arp

sudo arp -d 10.0.0.100 && ping 10.0.0.100

Not working again!

Perhaps the cause is that the broadcast does not arrive at veth1 and cannot respond to arp.

Is there a problem with my setup?

Additionally, Like ping -b 10.0.0.255, protocols other than arp are the same. Broadcast is not flooding on the bridge.

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Disabling rstp works fine! What could be the cause?