[ovs-discuss] OVS VM instances Network Topology Connection

[Felipe Arturo Polanco]

Hi yulunsus,

That configuration appears to be a good one, try debugging LAN Segment 2
out of OVS to see if you can ping correctly and then put eth1 back into the
ovs bridge.

Also try with tcpdump -i br0 icmp when you try to ping so you can see where
the packets come and go, in this scenario also check eth1 interface to see
if any packets are coming from VM3.

On Thu, Feb 23, 2017 at 11:57 AM, 蘇于倫 <yulunsus at gmail.com> wrote:

> Hi everyone,
>
> I am currently trying to build OVS VM topology in VMWare Workstation.
> I start with simple topology:
>
> VM1(OVS)  ------ VM2(OVS)
>
> In the 2 VMs, I set OVS and interfaces with following steps:
>
>    - Create 1 interface eth0 (LAN Segment 1) in VM1
>    - Create 1 interface eth0 (LAN Segment 1) in VM2
>    - In each VM:
>       - ovs-vsctl add-br br0
>       - ovs-vsctl add-port br0 eth0
>       - ifconfig eth0 0
>       - ifconfig br0 up
>       - ifconfig br0 192.168.46.11 netmask 255.255.255.0
>       (for VM2 IP Addr: 192.168.46.22)
>
> => Able to ping each other.
> But when I expand the topology to the following:
>
> VM1(OVS)  ------ VM2(OVS) ------ VM3(OVS)
>
> VM1:
> br0: eth0 (LAN Segment 1); IP:192.168.46.11; MAC addr is the same as eth0
> VM2:
> br0: eth0 (LAN Segment 1)
>        eth1 (LAN Segment 2)
>        MAC addr is the same as eth0
>        IP:192.168.46.22
> VM3:
> br0: eth0 (LAN Segment 2)
>        IP:192.168.46.33
>        MAC addr is the same as eth0
>
> =>VM1-VM2 are able to ping each other, however VM3 can't ping VM2
>
> Is my configuration correct for my purpose?
> I am wondering if the MAC addrshould be set to other address to avoid
> alisaing?
> I'd like to know what is the better way to connect OVS VM topology.
> Thanks for the help in advance!
>
> Ethan
>
>
>
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>
>
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