[ovs-discuss] Fwd: Packet drops with high rate of Packet_In

[Ben Pfaff]

I'm glad to hear that you worked around the problem.

By the way, I thought that you made a good point earlier that nothing
was logged when packet-ins were dropped, so I sent out a patch to fix
that.  I credited and CCed you on it.

On Thu, Dec 05, 2013 at 05:42:44PM +0100, Anton Matsiuk wrote:
> Thank you for response!
> 
> The problem was with MTU on Lo iface, after increasing it the TCP window
> increased up to the limit specified by socket on controller's side and
> packet drops stopped.
> 
> 
> On 4 December 2013 19:16, Ben Pfaff <blp at nicira.com> wrote:
> 
> > On Wed, Nov 27, 2013 at 04:59:02PM +0100, Anton Matsiuk wrote:
> > > Is it possible that OVS becomes overloaded with high number of incoming
> > > packets and generate Packet_In messages not to all of them without
> > logging
> > > it?
> >
> > Yes.  Once the TCP window fills up between OVS and the controller, OVS
> > only queues 100 packet-ins and then discards any others that arrive
> > before the window opens again.
> >
> 
> 
> 
> -- 
> Best regards,
> Anton Matsiuk
> 
> 
> 
> -- 
> Best regards,
> Anton Matsiuk

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