[ovs-discuss] Arp and Duplicate IP

Владимир Терентьев tervladimir at gmail.com
Thu Oct 15 11:59:20 UTC 2015


Hi. I have problem with openvswitch.

I have server (172.16.0.32) and client(172.16.0.222). On server installed
Openvswitch 2.3.0.
On server:
ifconfig eth0 0
ovs-vsctl add-br main-sw
ovs-vsctl add-port main-sw eth0
ovs-vsctl add-port br0 vm1 -- set interface vm1 type=internal
ovs-vsctl add-port br0 vm2 -- set interface vm2 type=internal
ovs-vsctl add-port br0 vm3 -- set interface vm3 type=internal

ifconfig main-sw 172.16.0.32/16 up
ifconfig vm1 0 up
ifconfig vm2 0 up
ifconfig vm3 0 up

When i try arp-scan 172.16.0.32/32 from client i have 4 arp-replays from
ports of openvswitch.(same ip, different mac). This get problem-sometimes i
cant ping server.(client get server mac from vm2, for example and wireshark
get error-Duplicate ip).

How i can fix it? Why ports get arp-answers if i dont set ip address on
ports?
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