[ovs-discuss] Problem in packet match

[Ben Pfaff]

On Fri, Oct 31, 2014 at 10:26:16PM +0530, Prashant Chougule wrote:
> Hi,
> I am using OVS-2.3.0 for setting IPv6 topology,works fine I am able to
> ping6 between two hosts,but when I added two flows with all match field
> like,
> #ovs-ofctl add-flow br0
> in_port=2,dl_type=0x86dd,nw_proto=58,ipv6_dst=2a00:1630:2:801::4,ipv6_src=2a00:1630:2:801::3,actions=output:1
> ./ovs-ofctl add-flow br0
> in_port=1,dl_type=0x86dd,nw_proto=58,ipv6_src=2a00:1630:2:801::4,ipv6_dst=2a00:1630:2:801::3,actions=output:2
> ping6 stops between two hosts.
> 
> If in same scenario I add flow like,
> #ovs-ofctl add-flow br0
> in_port=2,dl_type=0x86dd,nw_proto=58,actions=output:1
> #ovs-ofctl add-flow br0
> in_port=1,dl_type=0x86dd,nw_proto=58,actions=output:2
> ping6 works
> 
> reason of this behavior?

I guess that you probably need to allow neighbor discovery traffic
through as well.