[ovs-discuss] Does flows modifying arp field or using registers could only be used in slow path ?

Ben Pfaff blp at ovn.org
Tue Nov 19 18:48:54 UTC 2019

On Tue, Nov 19, 2019 at 02:55:29PM +0800, kai xi fan wrote:
> why does ovs not generate fast path flows for flows modifying arp
> field ? 

Because there isn't much benefit.  I do not know of any applications
where high-bandwidth flows modify ARP fields.

> I have seen a mega flow in the ovs trace result.  Final flow:
> unchanged Megaflow:
> recirc_id=0,eth,arp,in_port=1,vlan_tci=0x0000/0x1fff,dl_src=5e:89:3e:52:ef:8c,dl_dst=00:00:00:00:00:00
> Datapath actions: 1,3

This sentence seems to be about a different topic, because the output
you show does not involve modifying arp fields.

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