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?
