On Tue, Feb 23, 2016 at 03:25:24PM +0800, Hui Xiang wrote:
> Could anyone help to point out what does below output represents? Is there
> any document help to refer? 

Generally ovs-dpctl output consists of implementation details; we don't
document most of it.

> My environment is based on OpenStack neutron.
> 
> 1) Does the 'actions=NORMAL' in ovs-ofctl dump-flows makes ovs-dpctl
> dump-flows output looks like a learning switch?

Yes.

> 2) 'arp(sip=192.168.21.1,tip=192.168.21.1)' means source_ip equals to
> '192.168.21.1', dst_ip equals to '192.168.21.1' as well, does it make sense
> for ARP request?

This is a "gratuitous ARP".  You can do a web search for that term, for
more information.
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