[ovs-dev] Failed to trace path into open flow groups
Ben Pfaff
blp at ovn.org
Mon Nov 27 19:09:51 UTC 2017
On Mon, Nov 27, 2017 at 04:24:47PM +0800, Yongsheng Gong wrote:
> Hi,
>
> Ovs version 2.5.2:
> Os: ubuntu 16.04
>
> I have flows which in open flow groups, and I want to trace the path
> of one kind of flow to know how it is got to a certain open flow port:
I think that this is more of a bug in tracing write_actions(). It's
fixed in 2.8.0, which reports this sort of thing, e.g.:
blp at sigabrt:~/nicira/ovs/_build(0)$ make sandbox
...
blp at sigabrt:~/nicira/ovs/_build(0)$ ovs-vsctl add-br br0
blp at sigabrt:~/nicira/ovs/tutorial(0)$ ovs-ofctl -OOpenflow11 add-flow br0 'priority=65535,actions=write_actions(1)'
blp at sigabrt:~/nicira/ovs/tutorial(0)$ ovs-appctl ofproto/trace br0 in_port=local
Flow: in_port=LOCAL,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,dl_type=0x0000
bridge("br0")
-------------
0. priority 65535
write_actions(output:1)
-> action set is: output:1
--. Executing action set:
output:1
>> Nonexistent output port
Final flow: in_port=LOCAL,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,dl_type=0x0000
Megaflow: recirc_id=0,eth,in_port=LOCAL,dl_type=0x0000
Datapath actions: drop
blp at sigabrt:~/nicira/ovs/tutorial(0)$
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