Hi,
Flow entries in ovs are 0 in the initial phase. However I got
reply from the group that switch ports do not have mac address.
Regards,
Shyam
From: ext Dave Waters [mailto:[email protected]]
Sent: Thursday, July 23, 2015 4:24 AM
To: Pujar, Shyam (Nokia - IN/Bangalore)
Cc: ext Gurucharan Shetty; [email protected]
Subject: Re: [ovs-discuss] Flooding of packets destined to OVS port's mac
address
Shyam,
Not sure but the following could be happening:
When OVS receives the first packet with its own MAC address it hands it over to
the Linux kernel for L3 processing. Its the linux kernel that will now forward
the packet. Not sure if there will be a data plane rule installed for this flow.
You could send us the output of ovs-dpctl dump-flows so that we could look at
what flow gets installed when you send packets.
Dave
On Fri, Jul 17, 2015 at 12:43 PM, Pujar, Shyam (Nokia - IN/Bangalore)
<[email protected]<mailto:[email protected]>> wrote:
Hi,
MAC addresses mentioned in the diagram are just for example.
MAC addresses used were as follows:
Client Program:
52:54:00:00:01:02
Server Program:
52:56:11:80:80:41
TAP1:
52:F3:12:E4:6D:A9
TAP2:
72:17:32:32:15:F8
Regards,
Shyam
From: ext Gurucharan Shetty
[mailto:[email protected]<mailto:[email protected]>]
Sent: Thursday, July 16, 2015 11:48 PM
To: Pujar, Shyam (Nokia - IN/Bangalore)
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [ovs-discuss] Flooding of packets destined to OVS port's mac
address
I don't know the answer, but some of your mac addresses have multi-cast bit
enabled. So I wonder whether that is the problem.
On Wed, Jul 15, 2015 at 12:18 PM, Pujar, Shyam (Nokia - IN/Bangalore)
<[email protected]<mailto:[email protected]>> wrote:
Hi ,
Please find setup and testing procedure below.
[cid:[email protected]]
1. In the above setup, Client Program tries to send packet with src_mac:
3:3:3:3:3:3 and dst_mac: 1:1:1:1:1:1.
2. Packet is flood to port tap2.
3. Why does OVS flood packets when dst_mac received is its own port’s mac
address.
4. As it forwards to other ports, there is no one to reply for dst_mac
other than OVS bridge itself.
5. Where as in case of Linux bridge, packet is not flooded to other
ports. Instead packet is dropped.
Could you please tell me how do switches in real work? As per my understanding
there should be static entries in forwarding table of switch for its own mac
addresses.
And default action should be present for it.
Regards,
Shyam
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_______________________________________________
discuss mailing list
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--- Begin Message ---
I re-read your question properly again. The behavior that you see looks correct
to me. OVS is a switch and switch's ports don't have mac addresses. It only
cares about the mac addresses in the packet.
On Fri, Jul 17, 2015 at 12:13 AM, Pujar, Shyam (Nokia - IN/Bangalore)
<[email protected]<mailto:[email protected]>> wrote:
Hi,
MAC addresses mentioned in the diagram are just for example.
MAC addresses used were as follows:
Client Program:
52:54:00:00:01:02
Server Program:
52:56:11:80:80:41
TAP1:
52:F3:12:E4:6D:A9
TAP2:
72:17:32:32:15:F8
Regards,
Shyam
From: ext Gurucharan Shetty
[mailto:[email protected]<mailto:[email protected]>]
Sent: Thursday, July 16, 2015 11:48 PM
To: Pujar, Shyam (Nokia - IN/Bangalore)
Cc: [email protected]<mailto:[email protected]>
Subject: Re: [ovs-discuss] Flooding of packets destined to OVS port's mac
address
I don't know the answer, but some of your mac addresses have multi-cast bit
enabled. So I wonder whether that is the problem.
On Wed, Jul 15, 2015 at 12:18 PM, Pujar, Shyam (Nokia - IN/Bangalore)
<[email protected]<mailto:[email protected]>> wrote:
Hi ,
Please find setup and testing procedure below.
[cid:[email protected]]
1. In the above setup, Client Program tries to send packet with src_mac:
3:3:3:3:3:3 and dst_mac: 1:1:1:1:1:1.
2. Packet is flood to port tap2.
3. Why does OVS flood packets when dst_mac received is its own port’s mac
address.
4. As it forwards to other ports, there is no one to reply for dst_mac
other than OVS bridge itself.
5. Where as in case of Linux bridge, packet is not flooded to other
ports. Instead packet is dropped.
Could you please tell me how do switches in real work? As per my understanding
there should be static entries in forwarding table of switch for its own mac
addresses.
And default action should be present for it.
Regards,
Shyam
_______________________________________________
discuss mailing list
[email protected]<mailto:[email protected]>
http://openvswitch.org/mailman/listinfo/discuss
--- End Message ---
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discuss mailing list
[email protected]
http://openvswitch.org/mailman/listinfo/discuss
